| From: | Joshua Tolley <eggyknap(at)gmail(dot)com> |
|---|---|
| To: | Jeff Davis <pgsql(at)j-davis(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, ramon(dot)lawrence(at)ubc(dot)ca, pandasuit(at)gmail(dot)com |
| Subject: | Re: Patch Review Complete: Multi-Batch Hash Join Improvements |
| Date: | 2008-11-19 05:17:24 |
| Message-ID: | 20081119051724.GE10099@polonium.part.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Mon, Nov 17, 2008 at 10:42:21PM -0800, Jeff Davis wrote:
> On Mon, 2008-11-17 at 23:19 -0700, Joshua Tolley wrote:
> > -- it speeds up joins by fairly significant margins in some cases
>
> The original claim in the message you cite says 10-50% for some data
> distributions. Were you able to observe that kind of speedup?
>
> Regards,
> Jeff Davis
>
Oh, great, and now I can't find my numbers anymore :) After some
reflection I think there's some more formal verification I should expect
of myself before saying I'm done. I can say I saw results that supported
those claims, but I didn't gather enough data to prove them. Stay tuned
for details.
- Josh
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