Subject: Re: database size much bigger than tablespaces on filesystem
From: Guillaume Lelarge <guillaume@lelarge.info>
To: Rob Audenaerde <Rob.Audenaerde@Valuecare.nl>
Cc: "pgsql-admin@postgresql.org" <pgsql-admin@postgresql.org>
Date: Wed, 14 Sep 2011 14:00:15 +0200
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On Wed, 2011-09-14 at 04:03 -0700, Rob Audenaerde wrote:
> I have a Postgresql 8.3 instance with tablespaces totalling on about 74G. This is fine.
> 
> But if I ask Postgresql how big my database is, I get a (unexpected) large answer: 595 GB.
> 
> This seems very strange. Disk I/O tests on the system are in the 'normal' range, but queries are slower than they used to be.
> 
> Is this corruption of the database? Or are there ways to 'fix' this oddity?
> 
> Btw:
> 
> I check the tablespace size by the os:
> 
> /usr/local/pgsql/data/tblspaces/du -c -h
> 74G total 
> 
> All tablespaces are there. I check this by the \db command in pgsql
> 
> I check te database size like this:
> 
> select pg_size_pretty(pg_database_size('database')) 
> 595 GB

You should also check the space held in $PGDATA/base.


-- 
Guillaume
  http://blog.guillaume.lelarge.info
  http://www.dalibo.com