Re: COMMIT NOWAIT Performance Option

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От Jim C. Nasby
Тема Re: COMMIT NOWAIT Performance Option
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Msg-id 20070228002104.GA62448@nasby.net
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Ответ на Re: COMMIT NOWAIT Performance Option  (Bruce Momjian <bruce@momjian.us>)
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On Tue, Feb 27, 2007 at 07:17:37PM -0500, Bruce Momjian wrote:
> > Actually, I don't know that combining both settings is a wise move. The
> > delay should still provide crash protection, whereas with fsync=off
> > you've got absolutely no protection from anything. That's a huge
> > difference, and one that IMHO warrants a separate setting (and a big,
> > fat WARNING in the comment for that setting).
> 
> Yes, it needs a warning, or perhaps we just tell people to set it to
> something high and that is all they can do.

Before doing that I'd want to see how the performance compares to
fsync=off. My guess is that fsync=off is a big gain during checkpoints.
-- 
Jim Nasby                                            jim@nasby.net
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)


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