Re: Very long deletion time on a 200 GB database
От | Reuven M. Lerner |
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Тема | Re: Very long deletion time on a 200 GB database |
Дата | |
Msg-id | 4F47A48C.6000302@lerner.co.il обсуждение исходный текст |
Ответ на | Re: Very long deletion time on a 200 GB database (Shaun Thomas <sthomas@peak6.com>) |
Ответы |
Re: Very long deletion time on a 200 GB database
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Список | pgsql-performance |
Hi, everyone. Shaun said: > On 02/24/2012 12:39 AM, Reuven M. Lerner wrote: > >> - CPU is virtually idle when running the deletes, using about 1% of >> CPU > > I think you found your problem. > > See if you can get the Windows admins to give you some info on how busy > the disks are (percent utilization, IOPS, something) the next time you > try this. Increasing your memory settings may help, but a 1% CPU usage > usually suggests it's waiting for disk blocks to be read before it can > actually do something. I asked them for disk readings, but I'm not sure how to contextualize the numbers I got: I/O writes: process1: 820,000, process2: 1Milion Process3: 33,000 Any suggestions for what I can do to improve performance with such a slow disk, and a lack of additional RAM? Reuven -- Reuven M. Lerner -- Web development, consulting, and training Mobile: +972-54-496-8405 * US phone: 847-230-9795 Skype/AIM: reuvenlerner
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