Many RAC sessions in long wait, with root session waiting for 'gc current request'
Last updated on JANUARY 30, 2018
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
In a RAC database, a session may get stuck waiting for 'gc current request', with no obvious blocker. This can cause many sessions to pile up waiting so that there appears to be a database hang. Hanganalyze will show that the root session is waiting for 'gc current request'.
Example chain in hanganalyze output:
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