| From: | Steve <cheetah(at)tanabi(dot)org> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-patches(at)postgreSQL(dot)org, Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Subject: | Re: [HACKERS] choose_bitmap_and again (was Re: [PERFORM] Strangely Variable Query Performance) |
| Date: | 2007-04-14 22:55:45 |
| Message-ID: | Pine.GSO.4.64.0704141830490.17955@kittyhawk.tanabi.org |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-patches pgsql-performance |
> Steve, can you try this out on your queries and see if it makes better
> or worse decisions? It seems to fix your initial complaint but I do
> not have a large stock of test cases to try.
>
Wow, this is a remarkable difference. Queries that were taking
minutes to complete are coming up in seconds. Good work, I think this'll
solve my customer's needs for their demo on the 19th :)
Thank you so much!
Steve
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