Excessive "reliable Message" waits seen on RAC after a few days uptime (Doc ID 1990796.1)

Last updated on MARCH 03, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 to 12.1.0.2 [Release 12.1]
Information in this document applies to any platform.
"reliable message" waits can exceed 1 second.
This is for a 12.1.0.2 database (non-pluggable).
The problem does not manifest until a few days of up-time
The only workaround is to restart the instance.

Symptoms

Performance is affected severely for example a truncate command can take 20 minutes or more and AWR reports show high wait time for "reliable message".  

 

A hang analyze will also show 

service name: SYS$BACKGROUND 
     Current Wait Stack: 
      1: waiting for 'CSS group membership query' 

CSS group membership query's are not processed fast enough because of congestion. 

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms