<stuff@xxxxxxxxxxxxxxxxxxxx> writes: > The caching appears to disappear overnight. You've probably got cron jobs that run late at night and blow out your kernel disk cache by accessing a whole lot of non-Postgres stuff. (A nightly disk backup is one obvious candidate.) The most likely solution is to run some cron job a little later to exercise your database and thereby repopulate the cache with Postgres files before you get to work ;-) regards, tom lane
