From: Tom Lane <tgl@sss.pgh.pa.us>
To: rajan <vgmonnet@gmail.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: vacuum full is not reclaiming the space and showing non-removable rows
Date: Fri, 18 Nov 2016 11:01:12 -0500
Message-ID: <19337.1479484872@sss.pgh.pa.us> (raw)
In-Reply-To: <1479470449084-5930937.post@n3.nabble.com>
References: <1479470449084-5930937.post@n3.nabble.com>
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rajan <vgmonnet@gmail.com> writes:
> We deleted(using a delete query) a lot of rows from the above table and did
> a vacuum full. But we are not able to reclaim the space(occupied by this
> table) and the result is showing that there are nonremovable rows.
There's an old open transaction somewhere that's possibly still able to
see those rows. Look for idle sessions in pg_stat_activity.
I don't remember at the moment whether prepared-but-uncommitted
transactions can hold back reclaiming dead data, but look into
pg_prepared_xacts as well.
regards, tom lane
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To: pgsql-admin@postgresql.org
Cc: tgl@sss.pgh.pa.us, vgmonnet@gmail.com
Subject: Re: vacuum full is not reclaiming the space and showing non-removable rows
In-Reply-To: <19337.1479484872@sss.pgh.pa.us>
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