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Re: Abnormal storage consumption with autovacuum enabled

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Nicola Mauri <nicola(dot)mauri(at)saga(dot)it>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Abnormal storage consumption with autovacuum enabled
Date: 2007-05-25 13:57:19
Message-ID: 8327.1180101439@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-admin
Nicola Mauri <nicola(dot)mauri(at)saga(dot)it> writes:
>> What do you have max_fsm_pages set to? 
> Currently, max_fsm_pages=20000

> Running VACUUM VERBOSE reports:
>   NOTICE:  number of page slots needed (237312) exceeds max_fsm_pages (20000)
>   HINT:  Consider increasing the configuration parameter "max_fsm_pages" to a value over 237312.

Yup, there's your problem (or a huge chunk of it anyway).

> Is this measurement reliable?
> We are considering to set:   max_fsm_pages=400000
> Could this have some sort of impact?

It will require a slightly larger shared-memory segment than you have
now.

			regards, tom lane

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