Re: [PATCHES] Bitmapscan changes
От | Grzegorz Jaskiewicz |
---|---|
Тема | Re: [PATCHES] Bitmapscan changes |
Дата | |
Msg-id | 9435F455-7B24-40D6-B49C-23395D760051@pointblue.com.pl обсуждение исходный текст |
Ответ на | Re: [PATCHES] Bitmapscan changes ("Joshua D. Drake" <jd@commandprompt.com>) |
Список | pgsql-hackers |
This is on dual ultra 2 sparc. with ultrawide 320 scsi drives. 512MB ram. I had to drop size of DB, because the DB drive is 4GB (I do welecome bigger drives as donation, if someone asks - UWscsi 320). here are my results. With only 4.2 patch (no maintain cluster order v5 patch). If the v5 patch was needed, please tell me - I am going rerun it with. hope it is usefull. Repeat 3 times to ensure repeatable results. Timing is on. select_with_normal_index -------------------------- 100000 (1 row) Time: 1727891.334 ms select_with_normal_index -------------------------- 100000 (1 row) Time: 1325561.252 ms select_with_normal_index -------------------------- 100000 (1 row) Time: 1348530.100 ms Timing is off. And now run the same tests with clustered index Timing is on. select_with_clustered_index ----------------------------- 100000 (1 row) Time: 870246.856 ms select_with_clustered_index ----------------------------- 100000 (1 row) Time: 477089.456 ms select_with_clustered_index ----------------------------- 100000 (1 row) Time: 381880.965 ms Timing is off.
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