Re: Lots of stuck queries after upgrade to 9.4

From: Andres Freund <andres(at)anarazel(dot)de>
To: Spiros Ioannou <sivann(at)inaccess(dot)com>
Cc: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
Subject: Re: Lots of stuck queries after upgrade to 9.4
Date: 2015-07-20 14:02:43
Message-ID: 20150720140243.GD5520@alap3.anarazel.de
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On 2015-07-20 17:00:52 +0300, Spiros Ioannou wrote:
> FYI we have an 9.3.5 with commit_delay = 4000 and commit_siblings = 5 with
> a 8TB dataset which seems fine. (Runs on different - faster hardware
> though).

9.4 has a different xlog insertion algorithm (scaling much better), so
that unfortunately doesn't say very much...

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