Re: amount of WAL logs larger than expected

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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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