Re: Feature Request --- was: PostgreSQL Performance Tuning
От | Carlos Moreno |
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Тема | Re: Feature Request --- was: PostgreSQL Performance Tuning |
Дата | |
Msg-id | 463A4ED6.2040907@mochima.com обсуждение исходный текст |
Ответ на | Re: Feature Request --- was: PostgreSQL Performance Tuning (david@lang.hm) |
Ответы |
Re: Feature Request --- was: PostgreSQL Performance Tuning
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Список | pgsql-performance |
>> CPUs, 32/64bit, or clock speeds. So any attempt to determine "how >> fast" >> a CPU is, even on a 1-5 scale, requires matching against a database of >> regexes which would have to be kept updated. >> >> And let's not even get started on Windows. > > I think the only sane way to try and find the cpu speed is to just do > a busy loop of some sort (ideally something that somewhat resembles > the main code) and see how long it takes. you may have to do this a > few times until you get a loop that takes long enough (a few seconds) > on a fast processor I was going to suggest just that (but then was afraid that again I may have been just being naive) --- I can't remember the exact name, but I remember using (on some Linux flavor) an API call that fills a struct with data on the resource usage for the process, including CPU time; I assume measured with precision (that is, immune to issues of other applications running simultaneously, or other random events causing the measurement to be polluted by random noise). As for 32/64 bit --- doesn't PG already know that information? I mean, ./configure does gather that information --- does it not? Carlos --
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