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Re: A patch for xlog.c

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 (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-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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