On Tue, Jan 23, 2007 at 09:01:41PM -0600, Jim Nasby wrote: > On Jan 22, 2007, at 6:53 PM, Kenneth Marshall wrote: > >The default should > >be approximately the OS standard read-ahead amount. > > Is there anything resembling a standard across the OSes we support? > Better yet, is there a standard call that allows you to find out what > the read-ahead setting is? > -- > Jim Nasby [EMAIL PROTECTED] > EnterpriseDB http://enterprisedb.com 512.569.9461 (cell) > Not that I am aware of. Even extending the relation by one additional block can make a big difference in performance and should easily fall within every read-ahead in use today. Or a GUC variable, that defaults to a small power of 2 number of PostgreSQL blocks, with a default arrived at by testing.
Ken ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
