At Wed, 16 Feb 2022 15:22:27 +0900 (JST), Kyotaro Horiguchi 
<horikyota....@gmail.com> wrote in 
> At Wed, 16 Feb 2022 14:58:23 +0900, Masahiko Sawada <sawada.m...@gmail.com> 
> wrote in 
> > Or it's possible that the process took a time to clean up the
> > temporary replication slot?
> 
> Checkpointer may take ReplicationSlotControlLock. Dead lock between
> ReplicationSlotCleanup and InvalidateObsoleteReplicationSlots
> happened?

Or missing CV broadcast?  Anyway I haven't find a scenario of
interfering between checkpointer and walsender.

regards.

-- 
Kyotaro Horiguchi
NTT Open Source Software Center


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