Re: PostgreSQL + SMP

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От Alfred Perlstein
Тема Re: PostgreSQL + SMP
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Msg-id 20001210122630.J16205@fw.wintelcom.net
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Ответ на Re: PostgreSQL + SMP  (Bruce Momjian <pgman@candle.pha.pa.us>)
Ответы Re: PostgreSQL + SMP  (Bruce Momjian <pgman@candle.pha.pa.us>)
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* Bruce Momjian <pgman@candle.pha.pa.us> [001210 12:19] wrote:
> > Postgre is not threaded, but every connection gets it's own process.  The OS
> > will distribute the processes across the processors.  Not sure I said that
> > very will.
> >
> > Basically a single connection will not be any faster with SMP, but multiple
> > connections will be.
>
> Actually, even a single process will be faster because all other system
> process will run on other cpu's.

Depending on how idle you are, the large overhead of bus locking
can cause a lot of perf degredation(sp?) for the idle SMP case.

--
-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
"I have the heart of a child; I keep it in a jar on my desk."

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