Re: Why so slow?
От | Bealach-na Bo |
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Тема | Re: Why so slow? |
Дата | |
Msg-id | BAY101-F3027DA179AC8CEE9FAAF77ADB20@phx.gbl обсуждение исходный текст |
Ответ на | Re: Why so slow? ("Jim C. Nasby" <jnasby@pervasive.com>) |
Ответы |
Re: Why so slow?
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Список | pgsql-performance |
>The above shows that the indexes contained 10M rows and 160M of dead >space each. That means you weren't vacuuming nearly enough. How is it that a row in the table can grow to a size far exceeding the sum of the maximum sized of the fields it consists of? >13M dead rows, and the table is 1.4M pages, or 11GB. No wonder it's >slow. I had a look at the disk files and they are HUGE indeed. > >You need to run a vacuum full, and then you need to vacuum far more >often. If you're running 8.1, turn on autovacuum and cut each default >scale factor in half, to 0.2 and 0.1. I'm not runing 8.1. Is there a way of doing this in 8.0 or do I need to write a shell script + cron job? Regards, Bealach
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