On Wed, Mar 16, 2005 at 11:20:12PM -0500, Bruce Momjian wrote:
>
> Basically we do open_datasync -> fdatasync -> fsync. This is
> empirically what we found to be fastest on most operating systems, and
> we default to the first one that exists on the operating system.
>
> Notice we never default to open_sync. However, on Win32, Magnus got a
> 60% speedup by using open_sync, implemented using
> FILE_FLAG_WRITE_THROUGH. Now, because this the fastest on Win32, I
> think we should default to open_sync on Win32. The attached patch
> implements this.
>
> 2. Another question is what to do with 8.0.X? Do we backpatch this for
> Win32 performance? Can we test it enough to know it will work well?
> 8.0.2 is going to have a more rigorous testing cycle because of the
> buffer manager changes.
>
My preference would be to back-patch to 8.0.1. I have some projects
where the performance difference will decide whether or not they go
with MSSQL or PostgreSQL.
Ken