Many RAC sessions in long wait, with root session waiting for 'gc current request' (Doc ID 1907369.1)

Last updated on OCTOBER 13, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 and later
Information in this document applies to any platform.

Symptoms

 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:

 

Cause

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