Hi, I've read this: http://wiki.postgresql.org/wiki/Prioritizing_databases_by_separating_into_multiple_clusters
But it doesn't really say anything about memory. If i can fit an extra cluster into it's shared buffer, it should have fast reads, right? Even if i don't have seperate spindles and the disks are busy. This is on a Debain server, postgres 8.4 Cheers, WBL -- "Quality comes from focus and clarity of purpose" -- Mark Shuttleworth