On Fri, 2009-01-09 at 14:29 -0600, Kenneth Marshall wrote:
> Jeff,
>
> Thanks for the review. I would not really expect any differences in hash
> index build times other than normal noise variances. The most definitive
> benchmark that I have seen was done with my original patch submission
> in March posted by Luke of Greenplum:
>
> "We just applied this and saw a 5 percent speedup on a hash aggregation
> query with four columns in a 'group by' clause run against a single
> TPC-H table."
>
> I wonder if they would be willing to re-run their test? Thanks again.
Separating mix() and final() should have some performance benefit,
right?
Regards,Jeff Davis