Forgot to mention: you might also want to think about setting up a separate superuser account for the stats monitor. Unlike Unix, Postgres doesn't think there can be only one superuser. The advantage of this is (a) you can give it a separate password from what you normally use, and (b) you can choose some less obvious name than "postgres".
regards, tom lane
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TIP 7: don't forget to increase your free space map settings
