| From: | "Magnus Hagander" <mha(at)sollentuna(dot)net> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | <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: | 2005-02-18 16:28:09 |
| Message-ID: | 6BCB9D8A16AC4241919521715F4D8BCE4768F8@algol.sollentuna.se |
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| Lists: | pgsql-hackers pgsql-hackers-win32 |
> 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
| Attachment | Content-Type | Size |
|---|---|---|
| o_sync.patch | application/octet-stream | 3.2 KB |
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