On Fri, 9 Nov 2007 12:08:57 -0600 "Campbell, Lance" <lance@xxxxxxxx> wrote: > How do you know when you should up the value of work_mem? Just play > with the number. Is there a query I could do that would tell me if > PostgreSql is performing SQL that could use more memory for sorting? 8.2 and older, it can be difficult to know, and I don't have a specific recommendation. 8.3 includes a parameter to log the usage of temporary files by Postgres. When a sort can't fit in the available memory, it uses a temp file, thus you could use this new feature to track when sorts don't fit in work_mem. -- Bill Moran Potential Technologies http://www.potentialtech.com ---------------------------(end of broadcast)--------------------------- TIP 7: You can help support the PostgreSQL project by donating at http://www.postgresql.org/about/donate
