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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Devendra Singh Rawat <Devendra_Rawat@infosys.com>
Cc: Joshua D. Drake <jd@commandprompt.com>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Re: Disk Space issue
Date: Tue, 10 Jun 2008 21:28:37 -0400
Message-ID: <27795.1213147717@sss.pgh.pa.us> (raw)
In-Reply-To: <4242E42288B6E842A52B88D4B3A3E620E0610625@AUSMELMBX01.ad.infosys.com>
References: <484E61A0.5030706@kerkhove.net>
	<484E88AB.6020505@kerkhove.net>
	<4242E42288B6E842A52B88D4B3A3E620E0610550@AUSMELMBX01.ad.infosys.com>
	<1213142115.17340.213.camel@jd-laptop>
	<4242E42288B6E842A52B88D4B3A3E620E0610579@AUSMELMBX01.ad.infosys.com>
	<1213142730.17340.218.camel@jd-laptop>
	<4242E42288B6E842A52B88D4B3A3E620E0610625@AUSMELMBX01.ad.infosys.com>

Devendra Singh Rawat <Devendra_Rawat@infosys.com> writes:
> We ran the SQL to get the table which are consuming maximum space.
> The results are as shown:-
> SELECT relname, relpages FROM pg_class ORDER BY relpages DESC;
>                      relname                      | relpages
> --------------------------------------------------+----------
>  <table-1>                                       |    52869
>  <table-2>                                       |    31267
>  <table-3>                                |    15418
>  <table-4>                                |     9693
>  <table-5>                                    |     6426


> But these only cover around few GB of data.

pg_class.relpages is only up-to-date as of the last VACUUM.
There's already good reason to suspect that you're not vacuuming
enough; maybe some big tables are not getting vacuumed at all.

I'd suggest having a look into the data directory to see for yourself
which are the big files.  The documentation might help you:
http://www.postgresql.org/docs/8.3/static/storage.html
(IIRC, all of this except the material on tablespaces will apply
to 7.4.)

			regards, tom lane



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