From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
---|---|
To: | Mark Steben <mark(dot)steben(at)drivedominion(dot)com>, pgsql-admin <pgsql-admin(at)postgresql(dot)org> |
Subject: | Re: amount of WAL logs larger than expected |
Date: | 2016-05-09 18:27:43 |
Message-ID: | 5730D69F.3030208@commandprompt.com |
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Lists: | pgsql-admin |
On 05/09/2016 11:23 AM, Mark Steben wrote:
> Good afternoon
>
> We run postgres 9.2.12 and run vacuum on a 540GB database.
>
> I've attached a 'show all' for your reference. With CHECkPOINT_SEGMENTS
> set at 128
> and CHECKPOINT_COMPLETION_TARGET set at 0.9 I wouldn't expect the number
> of logs in pg_xlog to creep much over 400. But when we run vacuum, the
> number can climb to over 5000 and threatens to blow out on space. Is
> there something else I should be looking at causing this unexpected
> number of logs?
>
> Our server is also master for a slony1.2.2.3 slave and also to a hot
> standby server.
Are you archiving to your hot standby or streaming? If you are
archiving, you may not be returning a proper success code and thus
postgresql is keeping logs.
Also, you are well behind production (9.2.16) and there are
*significant* bug fixes in the release gaps between.
JD
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