That does sound like a lack-of-vacuuming problem. If the performance
goes back where it was after VACUUM FULL, then you can be pretty sure
of it. Note that autovacuum is not designed to fix this for you: it
only ever issues regular vacuum not vacuum full.
in our db system (for a website), i notice performance boosts after a vacuum
full. but then, a VACUUM FULL takes 50min+ during which the db is not really
accessible to web-users. is there another way to perform maintenance tasks
AND leaving the db fully operable and accessible?
thanks,
thomas
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