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From: Mario Weilguni <roadrunner6@gmx.at>
To: pgsql-performance@postgresql.org
Subject: Re: auto vacuum, not working?
Date: Fri, 13 Jan 2012 15:26:08 +0100
Message-ID: <4F103F00.2080904@gmx.at> (raw)
In-Reply-To: <000301ccd1ec$167ab7d0$43702770$@devshock.com>
References: <000301ccd1ec$167ab7d0$43702770$@devshock.com>

Am 13.01.2012 13:08, schrieb Anibal David Acosta:
>
> Hi,
>
> yesterday I delete about 200 million rows of a table (about 150GB of 
> data), after delete completes the autovacuum process start.
>
> The autovacuum is running for about 11 hours but no space is released
>
> Autovacuum parameters are with default values in postgresql.conf
>
> The postgres version is 9.0.3
>
> The pg activity reports:
>
> select (now()-query_start) as duration, waiting, current_query from 
> pg_stat_activity where current_query ilike '%auto%'
>
> 10:42:19.829       f              "autovacuum: VACUUM ANALYZE 
> public.myTable"
>
> How can I release the space used by deleted rows? Without block the table.
>
> Thanks!
>

vacuum does not reclaim space, just marks tuples dead. You need vacuum full.

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