On Tue, Apr 17, 2012 at 06:02:34AM +0200, Boszormenyi Zoltan wrote: > I listed two scenarios. > 1. occasional bump of the readahead window for large requests, > for smaller requests it uses the originally set size > 2. permanent bump of the readahead window for large requests > (larger than previously seen), all subsequent requests use > the new size > > Both can be implemented easily, which one do you prefer? > If you always use very large requests, 1) behaves like 2)
I'd say let's go for #2. #1 is probably more efficient but not what the programmer asked us to do. After all it's easy to increase the window size accordingly if you want so as a programmer. Michael -- Michael Meskes Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org) Michael at BorussiaFan dot De, Meskes at (Debian|Postgresql) dot Org Jabber: michael.meskes at googlemail dot com VfL Borussia! Força Barça! Go SF 49ers! Use Debian GNU/Linux, PostgreSQL -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
