Re: Update on high concurrency OLTP application and Postgres 8 tuning

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От Andrew Sullivan
Тема Re: Update on high concurrency OLTP application and Postgres 8 tuning
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Msg-id 20060920110731.GB18219@phlogiston.dyndns.org
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Ответ на Update on high concurrency OLTP application and Postgres 8 tuning  (Cosimo Streppone <cosimo@streppone.it>)
Ответы Re: Update on high concurrency OLTP application and Postgres  (Cosimo Streppone <cosimo@streppone.it>)
Список pgsql-performance
On Wed, Sep 20, 2006 at 11:09:23AM +0200, Cosimo Streppone wrote:
>
> I scheduled a cron job every hour or so that runs an analyze on the
> 4/5 most intensive relations and sleeps 30 seconds between every
> analyze.
>
> This has optimized db response times when many clients run together.
> I wanted to report this, maybe it can be helpful for others
> out there... :-)

This suggests to me that your statistics need a lot of updating.  You
_might_ find that setting the statistics to a higher number on some
columns of some of your tables will allow you to analyse less
frequently.  That's a good thing just because ANALYSE will impose an
I/O load.

A

--
Andrew Sullivan  | ajs@crankycanuck.ca
A certain description of men are for getting out of debt, yet are
against all taxes for raising money to pay it off.
        --Alexander Hamilton

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