Re: pg_stat_activity.waiting_start

From: Andres Freund <andres(at)anarazel(dot)de>
To: Joel Jacobson <joel(at)trustly(dot)com>,Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_stat_activity.waiting_start
Date: 2016-12-25 13:01:32
Message-ID: 3A362399-E1F0-4543-B0F9-022F477EB52D@anarazel.de
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On December 25, 2016 1:21:43 AM GMT+01:00, Joel Jacobson <joel(at)trustly(dot)com> wrote:

>Is it really a typical real-life scenario that processes can be
>waiting extremely often for extremely short periods of time,
>where the timing overhead would be significant?

Yes. Consider WAL insertion, procarray or other similar contended locks.

Andres
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Sent from my Android device with K-9 Mail. Please excuse my brevity.

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