Re: Performance problems testing with Spamassassin - Mailing list pgsql-performance

From Alvaro Herrera
Subject Re: Performance problems testing with Spamassassin
Date
Msg-id 20050729132319.GA13680@alvh.no-ip.org
Whole thread Raw
In response to Re: Performance problems testing with Spamassassin  ("Luke Lonergan" <LLonergan@greenplum.com>)
Responses Re: Performance problems testing with Spamassassin  ("Luke Lonergan" <llonergan@greenplum.com>)
List pgsql-performance
On Fri, Jul 29, 2005 at 03:01:07AM -0400, Luke Lonergan wrote:

> I guess we see the real culprit here.  Anyone surprised it's the WAL?

So what?  Are you planning to suggest people to turn fsync=false?

I just had a person lose 3 days of data on some tables because of that,
even when checkpoints were 5 minutes apart.  With fsync off, there's no
work _at all_ going on, not just the WAL -- heap/index file fsync at
checkpoint is also skipped.  This is no good.

--
Alvaro Herrera (<alvherre[a]alvh.no-ip.org>)
"In a specialized industrial society, it would be a disaster
to have kids running around loose." (Paul Graham)

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