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Re: [PERFORM] Slow execution of SET ROLE, SET search_path and RESET ROLE - Mailing list pgsql-performance

From Ulf Lohbrügge
Subject Re: [PERFORM] Slow execution of SET ROLE, SET search_path and RESET ROLE
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Msg-id CABZYQRJHhYEGXP6W19GoXajC6Ne3N+eUsn3sn_iC3a91xC=QvA@mail.gmail.com
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In response to Re: [PERFORM] Slow execution of SET ROLE, SET search_path and RESET ROLE  (Tom Lane <tgl@sss.pgh.pa.us>)
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2017-11-08 0:45 GMT+01:00 Tom Lane <tgl@sss.pgh.pa.us>:
Ulf Lohbrügge <ulf.lohbruegge@gmail.com> writes:
> I just ran "check_postgres.pl --action=bloat" and got the following output:
> ...
> Looks fine, doesn't it?

A possible explanation is that something is taking an exclusive lock
on some system catalog and holding it for a second or two.  If so,
turning on log_lock_waits might provide some useful info.

                        regards, tom lane

I just checked my configuration and found out that "log_lock_waits" was already enabled.

Unfortunately there is no log output of locks when those long running "SET ROLE" statements occur.

Regards,
Ulf

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