Re: CommitDelay performance improvement

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Philip Warner <pjw(at)rhyme(dot)com(dot)au>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: CommitDelay performance improvement
Date: 2001-02-24 06:36:00
Message-ID: 200102240636.BAA00664@candle.pha.pa.us
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> Philip Warner <pjw(at)rhyme(dot)com(dot)au> writes:
> > It may have been much earler in the debate, but has anyone checked to see
> > what the maximum possible gains might be - or is it self-evident to people
> > who know the code?
>
> fsync off provides an upper bound to the speed achievable from being
> smarter about when to fsync... I doubt that fsync-once-per-checkpoint
> would be much different.

That was my point, people should be doing fsync once per checkpoint
rather than never.

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