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vacuum message

From: Colton A Smith <smith(at)cs(dot)utk(dot)edu>
To: pgsql-admin(at)postgresql(dot)org
Subject: vacuum message
Date: 2005-09-21 20:00:18
Message-ID: Pine.LNX.4.62.0509211558440.5848@cetus5.cs.utk.edu (view raw or flat)
Thread:
Lists: pgsql-admin
Hi:

   I did a vacuum verbose on my database and at the end of the output I got 
the following:

INFO:  free space map: 85 relations, 18940 pages stored; 29584 total pages 
needed
DETAIL:  Allocated FSM size: 1000 relations + 20000 pages = 186 kB shared 
memory.
VACUUM

   Can somebody tell me what that means?

Thanks!

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