Re: Help with performance problems

On Friday 23 April 2004 14:57, Ron St-Pierre wrote:
Does this apply to 7.3.4 also?
>  Actually, since he's running 7.4, there's an even better way.  Do a
>  "VACUUM VERBOSE" (full-database vacuum --- doesn't matter whether you
>  ANALYZE or not).  At the end of the very voluminous output, you'll see
>  something like
>
>
>  INFO:  free space map: 240 relations, 490 pages stored; 4080 total pages
> needed DETAIL:  Allocated FSM size: 1000 relations + 20000 pages = 178 kB
> shared memory.
>
>
>  Here, I would need max_fsm_relations = 240 and max_fsm_pages = 4080 to
>  exactly cover the present freespace needs of my system.  I concur with
>  the suggestion to bump that up a good deal, of course, but that gives
>  you a real number to start from.
>
>
>  The DETAIL part of the message shows my current settings (which are the
>  defaults) and what the FSM is costing me in shared memory space.
>
> Good luck
> Ron
>
>
>
>
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> TIP 7: don't forget to increase your free space map settings