Redis error : Timeout performing EVAL (5000ms) with asp.net session state

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Getting frequent issues as below after migrating session state to redis

Timeout performing EVAL(5000ms), inst: 0,qs:5,in:65536,serverEndpoint: Unspecified/xxxxx, mgr 10 of 10 available, clientName:xxxx, IOCP:(Busy=0,Free=200,Min=100,Max=200),WORKER:(Busy=11,Free=189,Min=100,Max=200), v:2.0.519.65453

The inst, qs, in, busy, free value changes with each error. We are using on prem Redis instance with Tier 1-1GB and no replication memory allocated. With each person logging in we see 2 keys added(Internal, Data) and our data size overall is 2MB each. We have 70 keys approx. Keys are very small but 3 have very big values which makes up approx 1.7MB of 2 of which 1 itself may be of 1MB and other 2 make up. 7MB and rest 67 keys/values 0.3 mb I have seen this issue generally occurs when trying to fetch one of those 3 bigger key values. Is there any restriction in value size of a key? Or could it be some other issue?

This helped me, I did not have targetFramework in my httpRuntime tag in my web.config: learn.microsoft.com/en-us/answers/questions/993854/… – MartinS Oct 12, 2022 at 13:19

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