Re: in-transaction insert performance in 7.5devel

"Merlin Moncure" <merlin(dot)moncure(at)rcsonline(dot)com> writes:
> Tom Lane wrote:
>> Does it help if you change FlushBuffer to release buffer lock while
>> flushing xlog?

> Putting your change in resulted in about a 15% increase in insert
> performance. There may be some quirky things going on here with NTFS...

> I did an update clean from cvs and I noticed big speedup across the
> board. Right now sync performance is right in line with my
> expectations. In any case, I checked and confirm that there are no
> spurious fsyncs running when they are not supposed to be.

Was that 15% before or after updating from CVS?

The more I think about the looping aspect the less I like it, so I'd
prefer not to pursue making the unlock change for real. But if it's
really a 15% win then maybe we need to...

regards, tom lane