On Apr 1, 2005 9:21 AM, David Link <[EMAIL PROTECTED]> wrote: > Greetings worthymen. > > I have a question regarding filesystem disk space usage. > > We have a production database containing 5 years of sales data. > Linux 2.6.5; Postgresq 7.4.7. VACUUM ANALZYE the entire database > everynight (about 40min). > It's size, @SUM(pg_class.relpages) * 8192K, is ... > > About 66 Gigabytes on disk. > > When I rebuild the database (using pg_dump and pgsql ), the new > resultant database is .. > > About 48 Gigabytes on disk. > > A 27% space savings. > > Can someone tell me why that is?
Are you doing a vacuum full each night? What is the specific command(s) that you are using for vacuum, pg_dump and the import? -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ L. Friedman [EMAIL PROTECTED] LlamaLand http://netllama.linux-sxs.org ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster