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keepAliveCache.socketHealthCheck Is Causing A Severe Performance Degradation (Doc ID 2021598.1)

Last updated on MAY 11, 2018

Applies to:

Oracle WebLogic Server - Version 10.3.6 to 12.1.1.0
Information in this document applies to any platform.

Symptoms

WLS 10.3.6, NIO socket muxer is used

After setting -Dhttp.keepAliveCache.socketHealthCheckTimeout=1 (in this case, the cache is checking the health condition before returning the cached connection to the client for use), you are reporting a severe performance degradation.

Tracking the way ExecuteThread 36 evolves in the various thread dumps collected over the time we see:

  

From reading the source code, this implies that the socket read didn't timeout as it should. 

 

Cause

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