From: Tom Lane <tgl@sss.pgh.pa.us>
To: Pallav Kalva <pkalva@livedatagroup.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: 8.2 Autovacuum BUG ?
Date: Fri, 31 Aug 2007 11:39:35 -0400
Message-ID: <25038.1188574775@sss.pgh.pa.us> (raw)
In-Reply-To: <46D83427.60001@livedatagroup.com>
References: <46D83427.60001@livedatagroup.com>
Pallav Kalva <pkalva@livedatagroup.com> writes:
> We turned on autovacuums on 8.2 and we have a database which is read
> only , it is basically a USPS database used only for address lookups
> (only SELECTS, no updates/deletes/inserts).
> This database has about 10gig data and yesterday autovacuum started
> on this database and all of a sudden I see lot of archive logs generated
> during this time, I guess it might have generated close to 3-4gig data
> during this period.
Probably represents freezing of old tuples, which is a WAL-logged
operation as of 8.2. Is it likely that the data is 200M transactions
old?
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, pkalva@livedatagroup.com
Subject: Re: 8.2 Autovacuum BUG ?
In-Reply-To: <25038.1188574775@sss.pgh.pa.us>
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