On 2005-05-12, Andreas Pflug <[EMAIL PROTECTED]> wrote: > Andrew - Supernews wrote: >> dbsize looks at the actual size of files on disk; newsysviews does not, >> it shows estimated sizes as taken from relpages. > > Which shows *net* size only, not actual size because non-vacuumed rows > are not covered. It is correct after a vacuum full only.
nonsense relpages is updated from the value of RelationGetNumberOfBlocks(rel) which is definitive (it gets the value from smgr which gets it from the physical file sizes); the only inaccuracy is that it is correct only as of the time that the pg_class row was last updated (as done by any VACUUM, any ANALYZE, any CLUSTER or any CREATE INDEX on the table, at minimum). -- Andrew, Supernews http://www.supernews.com - individual and corporate NNTP services ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])
