Subject: Re: Autovacuum of pg_shdepend
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From: =?UTF-8?B?T25kxZllaiBTdsSbdGzDrWs=?= <osvetlik@flexibee.eu>
Message-ID: <572A56B9.1020202@flexibee.eu>
Date: Wed, 4 May 2016 22:08:25 +0200
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Dne 4.5.2016 v 20:52 Victor Yegorov napsal(a):
> 2016-05-04 18:08 GMT+03:00 Ondřej Světlík <osvetlik@flexibee.eu
> <mailto:osvetlik@flexibee.eu>>:
>
>     we have a strange problem with autovacuum. We have three workers,
>     but usually only one works and two are waiting as they are all
>     trying to process table pg_shdepend which is shared between all
>     databases.
>
>
> I hit the same issue when we've migrated out all large objects (~200Gb
> total), I've executed `vacuumlo` and then all autovacuums started to
> process `pg_shdepend`.
> They've been picking on this table over and over again from different
> databases, but were stopping on the truncation phase due to other
> autovacuums were waiting on the same table.
>
> I ended up manually vacuuming this table in the database, that was
> cleaned up, and also in the `postgres` DB. It fixed the case for me.
> This was on 9.0.23 though.
>
> --
> Victor Y. Yegorov

Thank you very much, we have a working autovacuum on one of our clusters 
again. That's awesome :-).

Ondřej


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