From: John Lister <john.lister-ps@kickstone.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-admin@postgresql.org
Subject: Re: controlling autovacuum during the day.
Date: Wed, 17 Dec 2008 14:28:07 -0000
Message-ID: <742A9D77A1BA4171AF52BBBF6F5F2C75@squarepi.com> (raw)
References: <2BB7361E57C4417A975C0474610BA4C3@squarepi.com>
<27759.1229521625@sss.pgh.pa.us>
> "John Lister" <john.lister-ps@kickstone.com> writes:
>> I'd like to use autovacuum to clean up the tables rather than schedule a
>> full vacuum with cron as it will be more selective/intelligent about what
>> gets cleaned. But is it possible to stop it running during peak/office
>> hours?
>
> No. Instead, set the vacuum cost parameters to make it run slow enough
> to not interfere too much with your work.
Cheers for the quick reply. I've tweaked them quite a bit, but we have quite
a few heavily updated tables that i'd like vacuuming to keep them in check.
Unfortunately the autovacuum does a FULL vacuum every so often locking the
tables for quite a long time, i'd like to move these to the evening if
possible.
I guess the only option is to add the big tables to the pg_autovacuum table
and run a script to enable them in the evening?
I guess autovacuum picks up changes to the pg_autovacuum table...
Is a global flag something that could be added to a future release? Or is it
possible to get the autovacuum/db process to reload the config file while
running using pg_reload_conf() for example?
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To: pgsql-admin@postgresql.org
Cc: john.lister-ps@kickstone.com, tgl@sss.pgh.pa.us
Subject: Re: controlling autovacuum during the day.
In-Reply-To: <742A9D77A1BA4171AF52BBBF6F5F2C75@squarepi.com>
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