| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Matthew Kirkwood <matthew(at)hairy(dot)beasts(dot)org> |
| Cc: | pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: A patch for xlog.c |
| Date: | 2001-02-24 16:41:06 |
| Message-ID: | 11948.983032866@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Matthew Kirkwood <matthew(at)hairy(dot)beasts(dot)org> writes:
> Here is a patch against 7.1beta5 to use mmap(), and thus a
> single write, to initialise xlogs. It may well improve
> performance of this on platforms/filesystems which write
> metadata synchronously.
Have you *demonstrated* any actual performance improvement from this?
How much? On what platforms?
I don't believe in adding unportable alternative implementations without
pretty darn compelling reasons ...
regards, tom lane
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