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Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:inherit;font-size:0.875rem;line-height:1.25rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">文档中心</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">关于 TiDB</div></div><style data-emotion="css xjq79n">.css-xjq79n{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:none;-moz-transform:none;-ms-transform:none;transform:none;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1jozaee">.css-1jozaee{margin:0;padding:0;margin-left:17px;}</style></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">快速上手</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">应用开发</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">部署标准集群</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据迁移</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据集成</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">运维操作</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控与告警</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">故障诊断</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">性能调优</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">教程</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 工具</div></div><style data-emotion="css 171pefp">.css-171pefp{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:rotate(90deg);-moz-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg);}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1xxsnna">.css-1xxsnna{height:auto;overflow:visible;-webkit-transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;margin:0;padding:0;margin-left:17px;}</style><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css kb2j4b">.css-kb2j4b{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/ecosystem-tool-user-guide"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">功能概览</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/ecosystem-tool-user-case"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">使用场景</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/download-ecosystem-tools"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">工具下载</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiUP</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/tidb-operator-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Operator</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Data Migration</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Lightning</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/dumpling-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Dumpling</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiCDC</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-12-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Binlog</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-9-0" tabindex="-1" 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role="treeitem" id="left-nav-treeview-0-12-9-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/monitor-tidb-binlog-cluster"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控告警</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-12-9-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-snygwd"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/stable/tidb-binlog-reparo"><div class="MuiBox-root css-8atqhb"><div 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data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiSpark</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12-12" tabindex="-1" 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class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiProxy</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li></div></div></ul></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">参考指南</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">常见问题解答 (FAQ)</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-15" tabindex="-1" 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(min-width:600px){.css-90fn5w{-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;}}</style><div class="css-90fn5w"><style data-emotion="css vofosd">.css-vofosd{padding:1.5rem 0;}@media (min-width:0px){.css-vofosd{width:100%;}}@media (min-width:600px){.css-vofosd{width:calc(100% - 17.5rem);}}</style><div class="MuiBox-root css-vofosd"><style data-emotion="css 1ekb41w">.css-1ekb41w{width:100%;margin-left:auto;box-sizing:border-box;margin-right:auto;display:block;padding-left:16px;padding-right:16px;}@media (min-width:600px){.css-1ekb41w{padding-left:24px;padding-right:24px;}}@media (min-width:1536px){.css-1ekb41w{max-width:1536px;}}</style><div class="MuiContainer-root MuiContainer-maxWidthXl doc-content css-1ekb41w"><div class="markdown-body MuiBox-root css-0"><h1 id="tidb-binlog-常见问题" style="position:relative"><a href="#tidb-binlog-%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98" aria-label="tidb binlog 常见问题 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>TiDB Binlog 常见问题</h1><p>本文介绍 TiDB Binlog 使用过程中的常见问题及解决方案。</p><h2 id="开启-binog-对-tidb-的性能有何影响" style="position:relative"><a href="#%E5%BC%80%E5%90%AF-binog-%E5%AF%B9-tidb-%E7%9A%84%E6%80%A7%E8%83%BD%E6%9C%89%E4%BD%95%E5%BD%B1%E5%93%8D" aria-label="开启 binog 对 tidb 的性能有何影响 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>开启 binog 对 TiDB 的性能有何影响？</h2><ul><li><p>对于查询无影响。</p></li><li><p>对于有写入或更新数据的事务有一点性能影响。延迟上，在 Prewrite 阶段要并发写一条 p-binlog 成功后才可以提交事务，一般写 binlog 比 KV Prewrite 快，所以不会增加延迟。可以在 Pump 的监控面板看到写 binlog 的响应时间。</p></li></ul><h2 id="tidb-binlog-的同步延迟一般为多少" style="position:relative"><a href="#tidb-binlog-%E7%9A%84%E5%90%8C%E6%AD%A5%E5%BB%B6%E8%BF%9F%E4%B8%80%E8%88%AC%E4%B8%BA%E5%A4%9A%E5%B0%91" aria-label="tidb binlog 的同步延迟一般为多少 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>TiDB Binlog 的同步延迟一般为多少？</h2><p>TiDB Binlog 的同步延迟为秒级别，在非业务高峰时延迟一般为 3 秒左右。</p><h2 id="drainer-同步下游-tidbmysql-的账号需要哪些权限" style="position:relative"><a href="#drainer-%E5%90%8C%E6%AD%A5%E4%B8%8B%E6%B8%B8-tidbmysql-%E7%9A%84%E8%B4%A6%E5%8F%B7%E9%9C%80%E8%A6%81%E5%93%AA%E4%BA%9B%E6%9D%83%E9%99%90" aria-label="drainer 同步下游 tidbmysql 的账号需要哪些权限 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Drainer 同步下游 TiDB/MySQL 的账号需要哪些权限？</h2><p>Drainer 同步账号需要有如下权限：</p><ul><li>Insert</li><li>Update</li><li>Delete</li><li>Create</li><li>Drop</li><li>Alter</li><li>Execute</li><li>Index</li><li>Select</li><li>Create View</li></ul><h2 id="pump-磁盘快满了怎么办" style="position:relative"><a href="#pump-%E7%A3%81%E7%9B%98%E5%BF%AB%E6%BB%A1%E4%BA%86%E6%80%8E%E4%B9%88%E5%8A%9E" aria-label="pump 磁盘快满了怎么办 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Pump 磁盘快满了怎么办？</h2><p>确认 GC 正常：</p><ul><li>确认 pump 监控面板 <strong>gc_tso</strong> 时间是否与配置一致。</li></ul><p>如 gc 正常以下调整可以降低单个 pump 需要的空间大小：</p><ul><li>调整 pump <strong>GC</strong> 参数减少保留数据天数。</li><li>添加 pump 结点。</li></ul><h2 id="drainer-同步中断怎么办" style="position:relative"><a href="#drainer-%E5%90%8C%E6%AD%A5%E4%B8%AD%E6%96%AD%E6%80%8E%E4%B9%88%E5%8A%9E" aria-label="drainer 同步中断怎么办 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Drainer 同步中断怎么办？</h2><p>使用以下 binlogctl 命令查看 Pump 状态是否正常，以及是否全部非 <code>offline</code> 状态的 Pump 都在正常运行。</p><pre><code class="hljs language-bash"><style data-emotion="css 1qhimia">.css-1qhimia{margin-right:3rem;overflow:auto;}</style><div class="MuiBox-root css-1qhimia">binlogctl -cmd pumps </div><style data-emotion="css ux9q70">.css-ux9q70{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;top:0.625rem;right:2.4rem;background:transparent;border:unset;}.css-ux9q70:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-ux9q70:hover{background-color:transparent;}}.css-ux9q70.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css 1rmx1rm">.css-1rmx1rm{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;top:0.625rem;right:2.4rem;background:transparent;border:unset;}.css-1rmx1rm::-moz-focus-inner{border-style:none;}.css-1rmx1rm.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-1rmx1rm{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-1rmx1rm:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-1rmx1rm:hover{background-color:transparent;}}.css-1rmx1rm.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeSmall css-1rmx1rm" tabindex="0" type="button" aria-label="Toggle code wrap"><style data-emotion="css 1cw4hi4">.css-1cw4hi4{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:inherit;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="WrapTextIcon"><path d="M4 19h6v-2H4v2zM20 5H4v2h16V5zm-3 6H4v2h13.25c1.1 0 2 .9 2 2s-.9 2-2 2H15v-2l-3 3 3 3v-2h2c2.21 0 4-1.79 4-4s-1.79-4-4-4z"/></svg></button><style data-emotion="css 1e2dcm1">.css-1e2dcm1{z-index:1500;pointer-events:none;}</style><style data-emotion="css okvapm">.css-okvapm{z-index:1500;pointer-events:none;}</style><style data-emotion="css rnn29l">.css-rnn29l{text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;top:0.625rem;right:0.625rem;background:transparent;border:unset;}.css-rnn29l:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-rnn29l:hover{background-color:transparent;}}.css-rnn29l.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><style data-emotion="css fxo539">.css-fxo539{display:-webkit-inline-box;display:-webkit-inline-flex;display:-ms-inline-flexbox;display:inline-flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;position:relative;box-sizing:border-box;-webkit-tap-highlight-color:transparent;background-color:transparent;outline:0;border:0;margin:0;border-radius:0;padding:0;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-moz-appearance:none;-webkit-appearance:none;-webkit-text-decoration:none;text-decoration:none;color:inherit;text-align:center;-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto;font-size:1.5rem;padding:8px;border-radius:50%;overflow:visible;color:rgba(0, 0, 0, 0.54);-webkit-transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:background-color 150ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;padding:5px;font-size:1.125rem;top:0.625rem;right:0.625rem;background:transparent;border:unset;}.css-fxo539::-moz-focus-inner{border-style:none;}.css-fxo539.Mui-disabled{pointer-events:none;cursor:default;}@media print{.css-fxo539{-webkit-print-color-adjust:exact;color-adjust:exact;}}.css-fxo539:hover{background-color:rgba(0, 0, 0, 0.04);}@media (hover: none){.css-fxo539:hover{background-color:transparent;}}.css-fxo539.Mui-disabled{background-color:transparent;color:rgba(0, 0, 0, 0.26);}</style><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeSmall css-fxo539" tabindex="0" type="button" aria-label="copy"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ContentCopyIcon"><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"/></svg></button></code></pre><p>查看 Drainer 监控与日志是否有对应报错，根据具体问题进行处理。</p><h2 id="drainer-同步下游-tidbmysql-慢怎么办" style="position:relative"><a href="#drainer-%E5%90%8C%E6%AD%A5%E4%B8%8B%E6%B8%B8-tidbmysql-%E6%85%A2%E6%80%8E%E4%B9%88%E5%8A%9E" aria-label="drainer 同步下游 tidbmysql 慢怎么办 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Drainer 同步下游 TiDB/MySQL 慢怎么办？</h2><p>特别关注以下监控项：</p><ul><li>通过 Drainer 监控 <strong>drainer event</strong>，可以看到 Drainer 当前每秒同步 Insert/Update/Delete 事件到下游的速度。</li><li>通过 Drainer 监控 <strong>sql query time</strong>，可以看到 Drainer 在下游执行 SQL 的响应时间。</li></ul><p>同步慢的可能原因与解决方案：</p><ul><li>同步的数据库包含没有主键或者唯一索引的表，需要给表加上主键。</li><li>Drainer 与下游之间延迟大，可以调大 Drainer <code>worker-count</code> 参数（跨机房同步建议将 Drainer 部署在下游）。</li><li>下游负载不高，可以尝试调大 Drainer <code>worker-count</code> 参数。</li></ul><h2 id="假如有一个-pump-crash-了会怎样" style="position:relative"><a href="#%E5%81%87%E5%A6%82%E6%9C%89%E4%B8%80%E4%B8%AA-pump-crash-%E4%BA%86%E4%BC%9A%E6%80%8E%E6%A0%B7" aria-label="假如有一个 pump crash 了会怎样 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>假如有一个 Pump crash 了会怎样？</h2><p>Drainer 会因为获取不到这个 Pump 的数据没法同步数据到下游。如果这个 Pump 能恢复，Drainer 就能恢复同步。</p><p>如果 Pump 没法恢复，可采用以下方式进行处理：</p><ol><li>使用 <a href="/zh/tidb/stable/maintain-tidb-binlog-cluster">binlogctl 将该 Pump 状态修改为 <code>offline</code></a>（丢失这个 Pump 的数据）</li><li>Drainer 获取到的数据会丢失这个 Pump 上的数据，下游跟上游数据会不一致，需要重新做全量 + 增量同步。具体步骤如下：<ol><li>停止当前 Drainer。</li><li>上游做全量备份。</li><li>清理掉下游数据，包括 checkpoint 表 <code>tidb_binlog.checkpoint</code>。</li><li>使用上游的全量备份恢复下游数据。</li><li>部署 Drainer，使用 <code>initialCommitTs</code>= {从全量备份获取快照的时间戳}。</li></ol></li></ol><h2 id="什么是-checkpoint" style="position:relative"><a href="#%E4%BB%80%E4%B9%88%E6%98%AF-checkpoint" aria-label="什么是 checkpoint permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>什么是 checkpoint？</h2><p>Checkpoint 记录了 Drainer 同步到下游的 commit-ts，Drainer 重启时可以读取 checkpoint 接着从对应 commit-ts 同步数据到下游。Drainer 日志 <code>["write save point"] [ts=411222863322546177]</code> 表示保存对应时间戳的 checkpoint。</p><p>下游类型不同，checkpoint 的保存方式也不同：</p><ul><li>下游 MySQL/TiDB 保存在 <code>tidb_binlog.checkpoint</code> 表。</li><li>下游 kafka/file 保存在对应配置目录里的文件。</li></ul><p>因为 kafka/file 的数据内容包含了 commit-ts，所以如果 checkpoint 丢失，可以消费下游最新的一条数据看写到下游数据的最新 commit-ts。</p><p>Drainer 启动的时候会去读取 checkpoint，如果读取不到，就会使用配置的 <code>initial-commit-ts</code> 做为初次启动开始的同步时间点。</p><h2 id="drainer-机器发生故障下游数据还在如何在新机器上重新部署-drainer" style="position:relative"><a href="#drainer-%E6%9C%BA%E5%99%A8%E5%8F%91%E7%94%9F%E6%95%85%E9%9A%9C%E4%B8%8B%E6%B8%B8%E6%95%B0%E6%8D%AE%E8%BF%98%E5%9C%A8%E5%A6%82%E4%BD%95%E5%9C%A8%E6%96%B0%E6%9C%BA%E5%99%A8%E4%B8%8A%E9%87%8D%E6%96%B0%E9%83%A8%E7%BD%B2-drainer" aria-label="drainer 机器发生故障下游数据还在如何在新机器上重新部署 drainer permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Drainer 机器发生故障，下游数据还在，如何在新机器上重新部署 Drainer？</h2><p>如果下游数据还在，只要保证能从对应 checkpoint 接着同步即可。</p><p>假如 checkpoint 还在，可采用以下方式进行处理：</p><ol><li>部署新的 Drainer 并启动即可（参考 checkpoint 介绍，Drainer 可以读取 checkpoint 接着同步）。</li><li>使用 <a href="/zh/tidb/stable/maintain-tidb-binlog-cluster">binlogctl 将老的 Drainer 状态修改成 <code>offline</code></a>。</li></ol><p>假如 checkpoint 不在，可以如下处理：</p><ol><li>获取之前 Drainer 的 checkpoint <code>commit-ts</code>，做为新部署 Drainer 的 <code>initial-commit-ts</code> 配置来部署新的 Drainer。</li><li>使用 <a href="/zh/tidb/stable/maintain-tidb-binlog-cluster">binlogctl 将老的 Drainer 状态修改成 <code>offline</code></a>。</li></ol><h2 id="如何用全量--binlog-备份文件来恢复一个集群" style="position:relative"><a href="#%E5%A6%82%E4%BD%95%E7%94%A8%E5%85%A8%E9%87%8F--binlog-%E5%A4%87%E4%BB%BD%E6%96%87%E4%BB%B6%E6%9D%A5%E6%81%A2%E5%A4%8D%E4%B8%80%E4%B8%AA%E9%9B%86%E7%BE%A4" aria-label="如何用全量 binlog 备份文件来恢复一个集群 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>如何用全量 + binlog 备份文件来恢复一个集群？</h2><ol><li>清理集群数据并使用全部备份恢复数据。</li><li>使用 reparo 设置 <code>start-tso</code> = {全量备份文件快照时间戳+1}，<code>end-ts</code> = 0（或者指定时间点），恢复到备份文件最新的数据。</li></ol><h2 id="主从同步开启-ignore-error-触发-critical-error-后如何重新部署" style="position:relative"><a href="#%E4%B8%BB%E4%BB%8E%E5%90%8C%E6%AD%A5%E5%BC%80%E5%90%AF-ignore-error-%E8%A7%A6%E5%8F%91-critical-error-%E5%90%8E%E5%A6%82%E4%BD%95%E9%87%8D%E6%96%B0%E9%83%A8%E7%BD%B2" aria-label="主从同步开启 ignore error 触发 critical error 后如何重新部署 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>主从同步开启 <code>ignore-error</code> 触发 critical error 后如何重新部署？</h2><p>TiDB 配置开启 <code>ignore-error</code> 写 binlog 失败后触发 critical error 告警，后续都不会再写 binlog，所以会有 binlog 数据丢失。如果要恢复同步，需要如下处理：</p><ol><li>停止当前 Drainer。</li><li>重启触发 critical error 的 <code>tidb-server</code> 实例重新开始写 binlog（触发 critical error 后不会再写 binlog 到 pump）。</li><li>上游做全量备份。</li><li>清理掉下游数据包括 checkpoint 表 <code>tidb_binlog.checkpoint</code>。</li><li>使用上游的全量备份恢复下游。</li><li>部署 Drainer，使用 <code>initialCommitTs</code>= {从全量备份获取快照的时间戳}。</li></ol><h2 id="同步时出现上游数据库支持但是下游数据库执行会出错的-ddl应该怎么办" style="position:relative"><a href="#%E5%90%8C%E6%AD%A5%E6%97%B6%E5%87%BA%E7%8E%B0%E4%B8%8A%E6%B8%B8%E6%95%B0%E6%8D%AE%E5%BA%93%E6%94%AF%E6%8C%81%E4%BD%86%E6%98%AF%E4%B8%8B%E6%B8%B8%E6%95%B0%E6%8D%AE%E5%BA%93%E6%89%A7%E8%A1%8C%E4%BC%9A%E5%87%BA%E9%94%99%E7%9A%84-ddl%E5%BA%94%E8%AF%A5%E6%80%8E%E4%B9%88%E5%8A%9E" aria-label="同步时出现上游数据库支持但是下游数据库执行会出错的 ddl应该怎么办 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>同步时出现上游数据库支持但是下游数据库执行会出错的 DDL，应该怎么办？</h2><ol><li><p>查看 drainer.log 日志，查找 <code>exec failed</code> 找到 Drainer 退出前最后一条执行失败的 DDL。</p></li><li><p>将 DDL 改为下游兼容支持的版本，在下游数据库中手动执行。</p></li><li><p>查看 drainer.log 日志，查找执行失败的 DDL 语句，可以查询到该 DDL 的 commit-ts。例如：</p><pre><code class="hljs language-plaintext"><div class="MuiBox-root css-1qhimia">[2020/05/21 09:51:58.019 +08:00] [INFO] [syncer.go:398] ["add ddl item to syncer, you can add this commit ts to `ignore-txn-commit-ts` to skip this ddl if needed"] [sql="ALTER TABLE `test` ADD INDEX (`index1`)"] ["commit ts"=416815754209656834]。 </div><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeSmall css-1rmx1rm" tabindex="0" type="button" aria-label="Toggle code wrap"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="WrapTextIcon"><path d="M4 19h6v-2H4v2zM20 5H4v2h16V5zm-3 6H4v2h13.25c1.1 0 2 .9 2 2s-.9 2-2 2H15v-2l-3 3 3 3v-2h2c2.21 0 4-1.79 4-4s-1.79-4-4-4z"/></svg></button><button class="MuiButtonBase-root MuiIconButton-root MuiIconButton-sizeSmall css-fxo539" tabindex="0" type="button" aria-label="copy"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ContentCopyIcon"><path d="M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z"/></svg></button></code></pre></li><li><p>编辑 <code>drainer.toml</code> 配置文件，在 <code>ignore-txn-commit-ts</code> 项中添加该 commit-ts，重启 Drainer。</p></li></ol><p>在绝大部分情况下，TiDB 和 MySQL 的语句都是兼容的。用户需要注意的是上下游的 <code>sql_mode</code> 应当保持一致。</p><h2 id="在什么情况下暂停和下线-pumpdrainer" style="position:relative"><a href="#%E5%9C%A8%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E6%9A%82%E5%81%9C%E5%92%8C%E4%B8%8B%E7%BA%BF-pumpdrainer" aria-label="在什么情况下暂停和下线 pumpdrainer permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>在什么情况下暂停和下线 Pump/Drainer？</h2><p>首先需要通过以下内容来了解 Pump/Drainer 的状态定义和启动、退出的流程。</p><p>暂停主要针对临时需要停止服务的场景，例如：</p><ul><li>版本升级：停止进程后使用新的 binary 启动服务。</li><li>服务器维护：需要对服务器进行停机维护。退出进程，等维护完成后重启服务。</li></ul><p>下线主要针对永久（或长时间）不再使用该服务的场景，例如：</p><ul><li>Pump 缩容：不再需要那么多 Pump 服务了，所以下线部分服务。</li><li>同步任务取消：不再需要将数据同步到某个下游，所以下线对应的 Drainer。</li><li>服务器迁移：需要将服务迁移到其他服务器。下线服务，在新的服务器上重新部署。</li></ul><h2 id="可以通过哪些方式暂停-pumpdrainer" style="position:relative"><a href="#%E5%8F%AF%E4%BB%A5%E9%80%9A%E8%BF%87%E5%93%AA%E4%BA%9B%E6%96%B9%E5%BC%8F%E6%9A%82%E5%81%9C-pumpdrainer" aria-label="可以通过哪些方式暂停 pumpdrainer permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>可以通过哪些方式暂停 Pump/Drainer？</h2><ul><li><p>直接 kill 进程。</p><style data-emotion="css 1weqspv">.css-1weqspv{padding-top:0.5rem;padding-bottom:0.5rem;}.css-1weqspv .MuiAlert-message p{margin-bottom:0px;margin-top:0px;}</style><div class="MuiBox-root css-1weqspv"><style data-emotion="css 17zlexa">.css-17zlexa{font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(1, 67, 97);background-color:rgb(229, 246, 253);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-17zlexa .MuiAlert-icon{color:#03a9f4;}</style><style data-emotion="css 152gid5">.css-152gid5{background-color:#fff;color:rgba(0, 0, 0, 0.87);-webkit-transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:4px;box-shadow:none;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(1, 67, 97);background-color:rgb(229, 246, 253);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-152gid5 .MuiAlert-icon{color:#03a9f4;}</style><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardInfo MuiAlert-standard css-152gid5" role="alert"><style data-emotion="css 1l54tgj">.css-1l54tgj{margin-right:12px;padding:7px 0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;font-size:22px;opacity:0.9;}</style><div class="MuiAlert-icon css-1l54tgj"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="InfoOutlinedIcon"><path d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"/></svg></div><style data-emotion="css 1xsto0d">.css-1xsto0d{padding:8px 0;min-width:0;overflow:auto;}</style><div class="MuiAlert-message css-1xsto0d"><style data-emotion="css 1h2y6o4">.css-1h2y6o4{font-weight:500;margin-top:-2px;}</style><style data-emotion="css 17ioyuk">.css-17ioyuk{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;margin-bottom:0.35em;font-weight:500;margin-top:-2px;}</style><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">注意</div><p>不能使用 <code>kill -9</code> 命令，否则 Pump/Drainer 无法对信号进行处理。</p></div></div></div></li><li><p>如果 Pump/Drainer 运行在前台，则可以通过按下 <kbd>Ctrl</kbd>+<kbd>C</kbd> 来暂停。</p></li><li><p>使用 binlogctl 的 <code>pause-pump</code> 或 <code>pause-drainer</code> 命令。</p></li></ul><h2 id="可以使用-binlogctl-的-update-pumpupdate-drainer-命令来下线-pumpdrainer-服务吗" style="position:relative"><a href="#%E5%8F%AF%E4%BB%A5%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-pumpupdate-drainer-%E5%91%BD%E4%BB%A4%E6%9D%A5%E4%B8%8B%E7%BA%BF-pumpdrainer-%E6%9C%8D%E5%8A%A1%E5%90%97" aria-label="可以使用 binlogctl 的 update pumpupdate drainer 命令来下线 pumpdrainer 服务吗 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>可以使用 binlogctl 的 <code>update-pump</code>/<code>update-drainer</code> 命令来下线 Pump/Drainer 服务吗？</h2><p>不可以。使用 <code>update-pump</code>/<code>update-drainer</code> 命令会直接修改 PD 中保存的状态信息，并且不会通知 Pump/Drainer 做相应的操作。使用不当时，可能会干扰数据同步，某些情况下还可能会造成<strong>数据不一致</strong>的严重后果。例如：</p><ul><li>当 Pump 正常运行或者处于暂停状态时，如果使用 <code>update-pump</code> 将该 Pump 设置为 <code>offline</code>，那么 Drainer 会放弃获取处于 <code>offline</code> 状态的 Pump 的 binlog 数据，导致该 Pump 最新的 binlog 数据没有同步到 Drainer，造成上下游数据不一致。</li><li>当 Drainer 正常运行时，使用 <code>update-drainer</code> 命令将该 Drainer 设置为 <code>offline</code>。如果这时启动一个 Pump 节点，Pump 只会通知 <code>online</code> 状态的 Drainer，导致该 Drainer 没有及时获取到该 Pump 的 binlog 数据，造成上下游数据不一致。</li></ul><h2 id="可以使用-binlogctl-的-update-pumpupdate-drainer-命令来暂停-pumpdrainer-服务吗" style="position:relative"><a href="#%E5%8F%AF%E4%BB%A5%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-pumpupdate-drainer-%E5%91%BD%E4%BB%A4%E6%9D%A5%E6%9A%82%E5%81%9C-pumpdrainer-%E6%9C%8D%E5%8A%A1%E5%90%97" aria-label="可以使用 binlogctl 的 update pumpupdate drainer 命令来暂停 pumpdrainer 服务吗 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>可以使用 binlogctl 的 <code>update-pump</code>/<code>update-drainer</code> 命令来暂停 Pump/Drainer 服务吗？</h2><p>不可以。<code>update-pump</code>/<code>update-drainer</code> 命令直接修改 PD 中保存的状态信息。执行这个命令并不会通知 Pump/Drainer 做相应的操作，<strong>而且使用不当会使数据同步中断，甚至造成数据丢失。</strong></p><h2 id="什么情况下使用-binlogctl-的-update-pump-命令设置-pump-状态为-paused" style="position:relative"><a href="#%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-pump-%E5%91%BD%E4%BB%A4%E8%AE%BE%E7%BD%AE-pump-%E7%8A%B6%E6%80%81%E4%B8%BA-paused" aria-label="什么情况下使用 binlogctl 的 update pump 命令设置 pump 状态为 paused permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>什么情况下使用 binlogctl 的 <code>update-pump</code> 命令设置 Pump 状态为 <code>paused</code>？</h2><p>在某些异常情况下，Pump 没有正确维护自己的状态，实际上状态应该为 <code>paused</code>。这时可以使用 <code>update-pump</code> 对状态进行修正，例如：</p><ul><li>Pump 异常退出（可能由 panic 或者误操作执行 <code>kill -9</code> 命令直接 kill 掉进程导致），Pump 保存在 PD 中的状态仍然为 <code>online</code>。如果暂时不需要重启 Pump 恢复服务，可以使用 <code>update-pump</code> 把该 Pump 状态设置为 <code>paused</code>，避免对 TiDB 写 binlog 和 Drainer 获取 binlog 造成干扰。</li></ul><h2 id="什么情况下使用-binlogctl-的-update-drainer-命令设置-drainer-状态为-paused" style="position:relative"><a href="#%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-drainer-%E5%91%BD%E4%BB%A4%E8%AE%BE%E7%BD%AE-drainer-%E7%8A%B6%E6%80%81%E4%B8%BA-paused" aria-label="什么情况下使用 binlogctl 的 update drainer 命令设置 drainer 状态为 paused permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>什么情况下使用 binlogctl 的 <code>update-drainer</code> 命令设置 Drainer 状态为 <code>paused</code>？</h2><p>在某些异常情况下，Drainer 没有正确维护自己的状态，，对数据同步造成了影响，实际上状态应该为 <code>paused</code>。这时可以使用 <code>update-drainer</code> 对状态进行修正，例如：</p><ul><li>Drainer 异常退出（出现 panic 直接退出进程，或者误操作执行 <code>kill -9</code> 命令直接 kill 掉进程），Drainer 保存在 PD 中的状态仍然为 <code>online</code>。当 Pump 启动时无法正常通知该 Drainer（报错 <code>notify drainer ...</code>），导致 Pump 无法正常运行。这个时候可以使用 <code>update-drainer</code> 将 Drainer 状态更新为 <code>paused</code>，再启动 Pump。</li></ul><h2 id="可以通过哪些方式下线-pumpdrainer" style="position:relative"><a href="#%E5%8F%AF%E4%BB%A5%E9%80%9A%E8%BF%87%E5%93%AA%E4%BA%9B%E6%96%B9%E5%BC%8F%E4%B8%8B%E7%BA%BF-pumpdrainer" aria-label="可以通过哪些方式下线 pumpdrainer permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>可以通过哪些方式下线 Pump/Drainer？</h2><p>目前只可以使用 binlogctl 的 <code>offline-pump</code> 和 <code>offline-drainer</code> 命令来下线 Pump 和 Drainer。</p><h2 id="什么情况下使用-binlogctl-的-update-pump-命令设置-pump-状态为-offline" style="position:relative"><a href="#%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-pump-%E5%91%BD%E4%BB%A4%E8%AE%BE%E7%BD%AE-pump-%E7%8A%B6%E6%80%81%E4%B8%BA-offline" aria-label="什么情况下使用 binlogctl 的 update pump 命令设置 pump 状态为 offline permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>什么情况下使用 binlogctl 的 <code>update-pump</code> 命令设置 Pump 状态为 <code>offline</code>?</h2><div class="MuiBox-root css-1weqspv"><style data-emotion="css 1rl2db2">.css-1rl2db2{font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(95, 33, 32);background-color:rgb(253, 237, 237);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-1rl2db2 .MuiAlert-icon{color:#ef5350;}</style><style data-emotion="css 21rxh6">.css-21rxh6{background-color:#fff;color:rgba(0, 0, 0, 0.87);-webkit-transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:4px;box-shadow:none;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(95, 33, 32);background-color:rgb(253, 237, 237);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-21rxh6 .MuiAlert-icon{color:#ef5350;}</style><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardError MuiAlert-standard css-21rxh6" role="alert"><div class="MuiAlert-icon css-1l54tgj"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ErrorOutlineIcon"><path d="M11 15h2v2h-2zm0-8h2v6h-2zm.99-5C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8z"/></svg></div><div class="MuiAlert-message css-1xsto0d"><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">警告</div><p>仅在可以容忍 binlog <strong>数据丢失、上下游数据不一致</strong>或者确认不再需要使用该 Pump 存储的 binlog 数据的情况下，才能使用 <code>update-pump</code> 修改 Pump 状态为 <code>offline</code>。</p></div></div></div><p>可以使用 <code>update-pump</code> 修改 Pump 状态为 <code>offline</code> 的情况有：</p><ul><li>在某些情况下，Pump 异常退出进程，且无法恢复服务，同步就会中断。如果希望恢复同步且可以容忍部分 binlog 数据丢失，可以使用 <code>update-pump</code> 命令将该 Pump 状态设置为 <code>offline</code>，则 Drainer 会放弃拉取该 Pump 的 binlog 然后继续同步数据。</li><li>有从历史任务遗留下来且不再使用的 Pump 且进程已经退出（例如测试使用的服务），之后不再需要使用该服务，使用 <code>update-pump</code> 将该 Pump 设置为 <code>offline</code>。</li></ul><p>在其他情况下一定要使用 <code>offline-pump</code> 命令让 Pump 走正常的下线处理流程。</p><h2 id="pump-进程已经退出且状态为-paused现在不想使用这个-pump-节点了能否用-binlogctl-的-update-pump-命令设置节点状态为-offline" style="position:relative"><a href="#pump-%E8%BF%9B%E7%A8%8B%E5%B7%B2%E7%BB%8F%E9%80%80%E5%87%BA%E4%B8%94%E7%8A%B6%E6%80%81%E4%B8%BA-paused%E7%8E%B0%E5%9C%A8%E4%B8%8D%E6%83%B3%E4%BD%BF%E7%94%A8%E8%BF%99%E4%B8%AA-pump-%E8%8A%82%E7%82%B9%E4%BA%86%E8%83%BD%E5%90%A6%E7%94%A8-binlogctl-%E7%9A%84-update-pump-%E5%91%BD%E4%BB%A4%E8%AE%BE%E7%BD%AE%E8%8A%82%E7%82%B9%E7%8A%B6%E6%80%81%E4%B8%BA-offline" aria-label="pump 进程已经退出且状态为 paused现在不想使用这个 pump 节点了能否用 binlogctl 的 update pump 命令设置节点状态为 offline permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Pump 进程已经退出，且状态为 <code>paused</code>，现在不想使用这个 Pump 节点了，能否用 binlogctl 的 <code>update-pump</code> 命令设置节点状态为 <code>offline</code>？</h2><p>Pump 以 <code>paused</code> 状态退出进程时，不保证所有 binlog 数据被下游 Drainer 消费。所以这样做会有上下游数据不一致的风险。正确的做法是重新启动 Pump，然后使用 <code>offline-pump</code> 下线该 Pump。</p><h2 id="什么情况下使用-binlogctl-的-update-drainer-命令设置-drainer-状态为-offline" style="position:relative"><a href="#%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E4%BD%BF%E7%94%A8-binlogctl-%E7%9A%84-update-drainer-%E5%91%BD%E4%BB%A4%E8%AE%BE%E7%BD%AE-drainer-%E7%8A%B6%E6%80%81%E4%B8%BA-offline" aria-label="什么情况下使用 binlogctl 的 update drainer 命令设置 drainer 状态为 offline permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>什么情况下使用 binlogctl 的 <code>update-drainer</code> 命令设置 Drainer 状态为 <code>offline</code>？</h2><ul><li>有从历史任务遗留下来且不再使用的 Drainer 且进程已经退出（例如测试使用的服务），之后不再需要使用该服务，使用 <code>update-drainer</code> 将该 Drainer 设置为 <code>offline</code>。</li></ul><h2 id="可以使用-change-pumpchange-drainer-等-sql-操作来暂停或者下线-pumpdrainer-服务吗" style="position:relative"><a href="#%E5%8F%AF%E4%BB%A5%E4%BD%BF%E7%94%A8-change-pumpchange-drainer-%E7%AD%89-sql-%E6%93%8D%E4%BD%9C%E6%9D%A5%E6%9A%82%E5%81%9C%E6%88%96%E8%80%85%E4%B8%8B%E7%BA%BF-pumpdrainer-%E6%9C%8D%E5%8A%A1%E5%90%97" aria-label="可以使用 change pumpchange drainer 等 sql 操作来暂停或者下线 pumpdrainer 服务吗 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>可以使用 <code>change pump</code>、<code>change drainer</code> 等 SQL 操作来暂停或者下线 Pump/Drainer 服务吗？</h2><p>目前还不支持。这种 SQL 操作会直接修改 PD 中保存的状态，在功能上等同于使用 binlogctl 的 <code>update-pump</code>、<code>update-drainer</code> 命令。如果需要暂停或者下线，仍然要使用 binlogctl。</p><h2 id="tidb-写入-binlog-失败导致-tidb-卡住日志中出现-listener-stopped-waiting-for-manual-stop" style="position:relative"><a href="#tidb-%E5%86%99%E5%85%A5-binlog-%E5%A4%B1%E8%B4%A5%E5%AF%BC%E8%87%B4-tidb-%E5%8D%A1%E4%BD%8F%E6%97%A5%E5%BF%97%E4%B8%AD%E5%87%BA%E7%8E%B0-listener-stopped-waiting-for-manual-stop" aria-label="tidb 写入 binlog 失败导致 tidb 卡住日志中出现 listener stopped waiting for manual stop permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>TiDB 写入 binlog 失败导致 TiDB 卡住，日志中出现 <code>listener stopped, waiting for manual stop</code></h2><p>在 TiDB v3.0.12 以及之前，binlog 写入失败会导致 TiDB 报 fatal error。但是 TiDB 不会自动退出只是停止服务，看起来像服务卡住。TiDB 日志中可看到 <code>listener stopped, waiting for manual stop</code>。</p><p>遇到该问题需要根据具体情况判断是什么原因导致 binlog 写入失败。如果是 binlog 写入下游缓慢导致的，可以考虑扩容 Pump 或增加写 binlog 的超时时间。</p><p>TiDB 在 v3.0.13 版本中已优化此逻辑，写入 binlog 失败将使事务执行失败返回报错，而不会导致 TiDB 卡住。</p><h2 id="tidb-向-pump-写入了重复的-binlog" style="position:relative"><a href="#tidb-%E5%90%91-pump-%E5%86%99%E5%85%A5%E4%BA%86%E9%87%8D%E5%A4%8D%E7%9A%84-binlog" aria-label="tidb 向 pump 写入了重复的 binlog permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>TiDB 向 Pump 写入了重复的 binlog？</h2><p>TiDB 在写入 binlog 失败或者超时的情况下，会重试将 binlog 写入到下一个可用的 Pump 节点直到写入成功。所以如果写入到某个 Pump 节点较慢，导致 TiDB 超时（默认 15s），此时 TiDB 判定写入失败并尝试写入下一个 Pump 节点。如果超时的 Pump 节点实际也写入成功，则会出现同一条 binlog 被写入到多个 Pump 节点。Drainer 在处理 binlog 的时候，会自动去重 TSO 相同的 binlog，所以这种重复的写入对下游无感知，不会对同步逻辑产生影响。</p><h2 id="在使用全量--增量方式恢复的过程中reparo-中断了可以使用日志里面最后一个-tso-恢复同步吗" style="position:relative"><a href="#%E5%9C%A8%E4%BD%BF%E7%94%A8%E5%85%A8%E9%87%8F--%E5%A2%9E%E9%87%8F%E6%96%B9%E5%BC%8F%E6%81%A2%E5%A4%8D%E7%9A%84%E8%BF%87%E7%A8%8B%E4%B8%ADreparo-%E4%B8%AD%E6%96%AD%E4%BA%86%E5%8F%AF%E4%BB%A5%E4%BD%BF%E7%94%A8%E6%97%A5%E5%BF%97%E9%87%8C%E9%9D%A2%E6%9C%80%E5%90%8E%E4%B8%80%E4%B8%AA-tso-%E6%81%A2%E5%A4%8D%E5%90%8C%E6%AD%A5%E5%90%97" aria-label="在使用全量增量方式恢复的过程中reparo 中断了可以使用日志里面最后一个 tso 恢复同步吗 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>在使用全量 + 增量方式恢复的过程中，Reparo 中断了，可以使用日志里面最后一个 TSO 恢复同步吗？</h2><p>可以。Reparo 不会在启动时自动开启 safe-mode 模式，需要手动操作：</p><ol><li>Reparo 中断后，记录日志中最后一个 TSO，记为 <code>checkpoint-tso</code>。</li><li>修改 Reparo 配置文件，将配置项 <code>start-tso</code> 设为 <code>checkpoint-tso + 1</code>，将 <code>stop-tso</code> 设为 <code>checkpoint-tso + 80,000,000,000</code>（大概是 <code>checkpoint-tso</code> 延后 5 分钟），将 <code>safe-mode</code> 设置为 <code>true</code>。启动 Reparo，Reparo 会将数据同步到 <code>stop-tso</code> 后自动停止。</li><li>Reparo 自动停止后，将 <code>start-tso</code> 设置为 <code>checkpoint tso + 80,000,000,001</code>，将 <code>stop-tso</code> 设置为 <code>0</code>，将 <code>safe-mode</code> 设为 <code>false</code>。启动 Reparo 继续同步。</li></ol></div></div><style data-emotion="css skmavs">.css-skmavs{padding-left:1.5rem;padding-right:1.5rem;}</style><div class="MuiBox-root css-skmavs"><style data-emotion="css j3rjqe">.css-j3rjqe{margin:0;font-size:2rem;font-weight:600;font-style:normal;font-family:"Poppins";line-height:3rem;color:#666666;color:#282a36;font-size:1.5rem;font-weight:600;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";line-height:1.25;margin-top:24px;margin-bottom:16px;padding-bottom:0.3em;border-bottom:1px solid #d8dee4;}</style><h2 class="MuiTypography-root MuiTypography-h2 css-j3rjqe">文档内容是否有帮助？</h2><style data-emotion="css 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