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OID and filesystem issues

From: lfedden(at)contextworld(dot)com
To: pgsql-admin(at)postgresql(dot)org
Subject: OID and filesystem issues
Date: 2008-04-15 09:00:26
Message-ID: 4F9161CEA8.07DC005BTFSFDCZG@contextworld.com (view raw or flat)
Thread:
Lists: pgsql-admin
Hi All,

I have a couple of questions hopefully someone can help me with.

1) Does every relation exist in pg_class? Can we assume that if there is a file with OID which is not present in pg_class, this file can be deleted? (we have a few such files, some of them take more than 2G of space in total)

2) If we remove such file and run vaccum or pg_dump will we get into troubles ? Where does vaccum take information about relations from? pg_class or filesystem ?

3) We have a relation which is unaccessible (permission denied), ls -l also prints this message so it's something with filesystem. What would be the best procedure to solve this issue ?

Thanks
Lee. *****************************************************
Lee Fedden
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