We have a bytea column where we store large attachments (ie pdf file). every so often (2 weekly) we replace the large a attachment (5-15mb) with a much smaller binary file (15k). when I run SELECT sum( relpages*8/1024 ) as MB FROM pg_class where relname != '' I get a value of 104995 which I interpret to mean I have 104GB of stored data in the database and this value has remained relatively static (+/- 1GB) over the past couple of weeks. We I to a df -h on the filesystem holding the database cluster I get a usage of 140GB. Again I interpret this to mean I have nearly 35GB of "uncleaned" data. Is this a case where I should be running the vacuum manually or is auto vacuum all that should be necessary to keep track and mark the updated tuple space ready for re-use. thanks -- Warren Little Chief Technology Officer Meridias Capital, Inc 1006 Atherton Dr Salt Lake City, UT 84123 ph. 866.369.7763
