From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Allowing WAL fsync to be done via O_SYNC |
Date: | 2001-03-16 03:41:12 |
Message-ID: | 17975.984714072@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> I was wondering if the multiple writes performed to the XLOG could be
> grouped into one write().
That would require fairly major restructuring of xlog.c, which I don't
want to undertake at this point in the cycle (we're trying to push out
a release candidate, remember?). I'm not convinced it would be a huge
win anyway. It would be a win if your average transaction writes
multiple blocks' worth of XLOG ... but if your average transaction
writes less than a block then it won't help.
I think it probably is a good idea to restructure xlog.c so that it can
write more than one page at a time --- but it's not such a great idea
that I want to hold up the release any more for it.
regards, tom lane
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