From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Magnus Hagander <mha(at)sollentuna(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org, pgsql-hackers-win32(at)postgresql(dot)org, Merlin Moncure <merlin(dot)moncure(at)rcsonline(dot)com> |
Subject: | Re: win32 performance - fsync question |
Date: | 2005-02-27 00:54:00 |
Message-ID: | 200502270054.j1R0s0822782@candle.pha.pa.us |
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Thread: | |
Lists: | pgsql-hackers pgsql-hackers-win32 |
Patch applied. Thanks.
I assume this is not approprate for 8.0.X.
---------------------------------------------------------------------------
Magnus Hagander wrote:
> > Magnus prepared a trivial patch which added the O_SYNC flag
> > for windows and mapped it to FILE_FLAG_WRITE_THROUGH in
> > win32_open.c.
>
> Attached is this trivial patch. As Merlin says, it needs some more
> reliability testing. But the numbers are at least reasonable - it
> *seems* like it's doing the right thing (as long as you turn off write
> cache). And it's certainly a significant performance increase - it
> brings the speed almost up to the same as linux.
>
>
> //Magnus
Content-Description: o_sync.patch
[ Attachment, skipping... ]
>
> ---------------------------(end of broadcast)---------------------------
> TIP 8: explain analyze is your friend
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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