Re: Autovacuum is running forever

From: "Sachchida Ojha" <sojha(at)secure-elements(dot)com>
To: "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>
Cc: "Michael Glaesemann" <grzm(at)seespotcode(dot)net>, <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Autovacuum is running forever
Date: 2007-08-21 22:20:02
Message-ID: E099DB9EF394534CBA0F62ED03CF3BBF05FDBF77@EXVS01.IceMAIL.com
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Thanks to all of you. I have changed the settings and reloaded the
config. Let me run this system overnight. I will update this forum if
new settings works for me. I am also asking management to upgrade the
hardware.

Thanks a lot.

Regards
Sachchida

-----Original Message-----
From: Scott Marlowe [mailto:scott(dot)marlowe(at)gmail(dot)com]
Sent: Tuesday, August 21, 2007 6:05 PM
To: Sachchida Ojha
Cc: Michael Glaesemann; pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] Autovacuum is running forever

On 8/21/07, Sachchida Ojha <sojha(at)secure-elements(dot)com> wrote:
> Is there any data corruption/damage to the database if we forcefully
> kill autovacuum using cron job (if it is running longer than a
> predefined time frame).

Oh, and I'd look at your I/O subsystem. You might want to look at
putting $300 hardware RAID cards with battery backed cache and 4 or so
disks in a RAID10 in them. It sounds to me like you could use more I/O
for your vacuuming. Vacuuming isn't CPU intensive, but it can be I/O
intensive.

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