Too Many Stale Connections AWS Elasticache Redis

[akshayk-ktk]

I have an AWS EC2 machine where my service is running. We have 2 elasticache redis clusters.

1. WS-Redis (MultiAZ disabled, 2 Shards)
2. SID-Redis (MultiAZ Enabled, 1 Shard - 2 Replicas)

The connection configuration we are using is,

• WS-Redis

  poolSize: 1000  
  connMaxIdleTime: 30m  
  dialTimeout: 5s  
  poolTimeout: 5s  
  readTimeout: 10s
  minIdleConns: 50  
  maxIdleConns: 100
  connMaxLifetime: 1h  

• SID-Redis

  poolSize: 350  
  connMaxIdleTime: 10m  
  dialTimeout: 5s  
  poolTimeout: 5s  
  readTimeout: 10s
  minIdleConns: 50  
  maxIdleConns: 100
  connMaxLifetime: 30m  

We are seeing lot of stale connections for the client for SID-Redis

While for WS-Redis, we don't see this issue.

Is this related to how the WS Redis and SID Redis are configured or its related to the client config we are using for SID Redis. Is it fine if stale connections are higher or it can cause issues?

As per our use case the load on SID from our service will be less because of which we have a lower configuration.

Any help is appreciated here.

Go-Redis Version - github.com/redis/go-redis/v9 v9.7.1