Re: Poor Performance on a table

От: Pallav Kalva
Тема: Re: Poor Performance on a table
Дата: ,
Msg-id: 41AF6DE5.8020301@deg.cc
(см: обсуждение, исходный текст)
Ответ на: Re: Poor Performance on a table  (Frank Wiles)
Ответы: Re: Poor Performance on a table  (Frank Wiles)
Список: pgsql-performance

Скрыть дерево обсуждения

Poor Performance on a table  (Pallav Kalva, )
 Re: Poor Performance on a table  (Frank Wiles, )
  Re: Poor Performance on a table  (Pallav Kalva, )
   Re: Poor Performance on a table  (Frank Wiles, )
 Re: Poor Performance on a table  (Tom Lane, )
  Re: Poor Performance on a table  (Pallav Kalva, )
   Re: Poor Performance on a table  (Tom Lane, )
   Re: Poor Performance on a table  (Josh Berkus, )

Hi Frank,

    Thanks! for the quick reply, here are my current default fsm setting .
 max_fsm_pages   = 20000 and  max_fsm_relations  =  1000
   What are the appropriates settings for these parameters ? are there
any guidlines ? postgres docs doesnt give much information on setting
these values.

Thanks!
Pallav

Frank Wiles wrote:

>On Thu, 02 Dec 2004 14:11:46 -0500
>Pallav Kalva <> wrote:
>
>
>
>>Hi ,
>>
>>    I have a table in my production database which has 500k rows and
>>from the pg_class it shows the number of "relpages" of
>>around 750K for this table, the same table copied to a test database
>>shows "relpages" as 35k. I run vacuumdb on the whole
>>database (not on the table individually but the whole database) daily.
>>
>>I think because of this most of queries are slowing down which used to
>>
>>run much faster before.
>>  Is there any way to fix this problem ?
>>
>>
>
>  Try a VACUUM FULL, this will clean up unused space.  You might also
>  want to adjust your free space map so that you don't have to do FULL
>  vacuums as often ( or at all ).  It is controlled by max_fsm_pages
>  and max_fsm_relations.
>
> ---------------------------------
>   Frank Wiles <>
>   http://www.wiles.org
> ---------------------------------
>
>
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