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Re: Vacuum time degrading

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Wes <wespvp(at)syntegra(dot)com>
Cc: Postgresql-General <pgsql-general(at)postgresql(dot)org>
Subject: Re: Vacuum time degrading
Date: 2005-03-02 18:16:10
Message-ID: 12092.1109787370@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackers
Wes <wespvp(at)syntegra(dot)com> writes:
> It took 5.2 hours again tonight to do the vacuum.  I don't see anything out
> of the ordinary - no explanation for the non-linear increases in vacuum
> time.

Would you post the complete VACUUM VERBOSE log?  The CPU/elapsed time lines
would help us identify where the time is going.

> This is what shows up at the end:

> INFO:  free space map: 93 relations, 282 pages stored; 1712 total pages
> needed
> DETAIL:  Allocated FSM size: 1000 relations + 1000000 pages = 5920 kB shared
> memory.

Well, you don't have a problem with FSM being too small anyway ;-)

			regards, tom lane

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