High waits for CSS group membership query in RAC Database
Last updated on NOVEMBER 01, 2017
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124 [Release 11.2]
Information in this document applies to any platform.
***Checked for relevance on 01-Nov-2017***
RAC instances experience high waits for CSS group membership query.
LCK0 background process is waiting for CSS group membership query and there can also be many processes waiting for rdbms ipc timeout
In some cases Parallel Query is involved.
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