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* pg_toast size
@ 2006-04-14 13:13 Julien Drouard <jdrouard@ankama.com>
0 siblings, 1 reply; 2+ messages in thread
From: Julien Drouard @ 2006-04-14 13:13 UTC (permalink / raw)
To: pgsql-performance
Hi everyone,
I've seen my pg_toast tables are becoming bigger and bigger. After googling I would like to modify my max_fsm_pages parameter to prevent that kind of problem. So I'm wondering if changing this parameter is enough and after that how can I reduce the size of these tables? By doing a full vacuum?
Thanks in advance,
Julien
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: pg_toast size
@ 2006-04-18 21:34 Jim C. Nasby <jnasby@pervasive.com>
parent: Julien Drouard <jdrouard@ankama.com>
0 siblings, 0 replies; 2+ messages in thread
From: Jim C. Nasby @ 2006-04-18 21:34 UTC (permalink / raw)
To: Julien Drouard <jdrouard@ankama.com>; +Cc: pgsql-performance
On Fri, Apr 14, 2006 at 03:13:43PM +0200, Julien Drouard wrote:
> Hi everyone,
>
> I've seen my pg_toast tables are becoming bigger and bigger. After googling I would like to modify my max_fsm_pages parameter to prevent that kind of problem. So I'm wondering if changing this parameter is enough and after that how can I reduce the size of these tables? By doing a full vacuum?
A full vacuum would do it. CLUSTERing the table might rewrite the toast
tables as well.
As for toast, if you do a vacuum verbose over the entire cluster, it
will tell you at the end how much space you need in the FSM. See also
http://www.pervasivepostgres.com/instantkb13/article.aspx?id=10087
and http://www.pervasivepostgres.com/instantkb13/article.aspx?id=10116
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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