Patch applied. Thanks.
---------------------------------------------------------------------------
Hiroshi Saito wrote:
> Hi.
>
> I wanted to see this difference. It is somewhat ad hoc.
> However, It is more effective than it doesn't show it at all.
>
> -- MinGW(win32) --
> $ test_fsync
> Simple write timing:
> write 3.644000
>
> Compare fsync times on write() and non-write() descriptor:
> (If the times are similar, fsync() can sync data written
> on a different descriptor.)
> write, fsync, close 40.543000
> write, close, fsync 47.033000
>
> Compare one o_sync write to two:
> (o_sync unavailable)
> open o_dsync, write 0.094000
>
> (fdatasync unavailable)
> write, fsync, 26.700000
>
> Compare file sync methods with 2 8k writes:
> open o_dsync, write 0.203000
> (fdatasync unavailable)
> write, fsync, 27.920000
>
>
> Regards,
> Hiroshi Saito
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--
Bruce Momjian bruce@momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +