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On 07/19/2012 11:13 AM, Felix Scheicher wrote:
Andrew Dunstan <andrew <at> dunslane.net> writes:Try running CLUSTER on the relevant tables and see if it makes a difference. If it does you might want to look into using pg_reorg periodically.That worked like a charm! Many thanks. But how comes, the queries are also fast after a restore without the cluster?
There is probably a lot of unused space in your table. CLUSTER rewrites a fresh copy, as do restore and pg_reorg.
You might also want to try changing the settings on the table so it gets much more aggressively auto-vacuumed, so that dead space is made available much more quickly, and the table has less chance to get bloated.
cheers andrew -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
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