[GENERAL] startup process stuck in recovery

Hi,

We're dealing with a 9.5.5 database with the symptom that, after a certain amount of time after restart, the startup
processreaches a certain WAL segment, and stops.  The startup process runs at 100% CPU, with no output from strace.
Thereare no queries running on the secondary, so it's not a delay for queries.  The WAL receiver continues to operate
normally,and we can see sent_location / write_location / flush_location continue to move ahead in parallel, with
replay_locationstuck in that WAL segment. 

Suggestions on further diagnosis?

--
-- Christophe Pettus  xof@thebuild.com



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