Speed with offset clause
От | Yves Vindevogel |
---|---|
Тема | Speed with offset clause |
Дата | |
Msg-id | 1c365a8bdeb09957fadda7a6fdc8ff02@implements.be обсуждение исходный текст |
Ответы |
Re: Speed with offset clause
Re: Speed with offset clause |
Список | pgsql-performance |
Hi again all, My queries are now optimised. They all use the indexes like they should. However, there's still a slight problem when I issue the "offset" clause. We have a table that contains 600.000 records We display them by 25 in the webpage. So, when I want the last page, which is: 600k / 25 = page 24000 - 1 = 23999, I issue the offset of 23999 * 25 This take a long time to run, about 5-10 seconds whereas offset below 100 take less than a second. Can I speed this up ? Met vriendelijke groeten, Bien à vous, Kind regards, <bold>Yves Vindevogel</bold> <bold>Implements</bold> <smaller> </smaller>Hi again all, My queries are now optimised. They all use the indexes like they should. However, there's still a slight problem when I issue the "offset" clause. We have a table that contains 600.000 records We display them by 25 in the webpage. So, when I want the last page, which is: 600k / 25 = page 24000 - 1 = 23999, I issue the offset of 23999 * 25 This take a long time to run, about 5-10 seconds whereas offset below 100 take less than a second. Can I speed this up ? Met vriendelijke groeten, Bien à vous, Kind regards, Yves Vindevogel Implements <smaller> Mail: yves.vindevogel@implements.be - Mobile: +32 (478) 80 82 91 Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76 Web: http://www.implements.be <italic><x-tad-smaller> First they ignore you. Then they laugh at you. Then they fight you. Then you win. Mahatma Ghandi.</x-tad-smaller></italic></smaller> Mail: yves.vindevogel@implements.be - Mobile: +32 (478) 80 82 91 Kempische Steenweg 206 - 3500 Hasselt - Tel-Fax: +32 (11) 43 55 76 Web: http://www.implements.be First they ignore you. Then they laugh at you. Then they fight you. Then you win. Mahatma Ghandi.
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