2009/12/8 Lennin Caro <lennin.caro@xxxxxxxxx> > > From: niraj patel <npatel@xxxxxxxxxxxx> > > Subject: Re: Optimizing Bitmap Heap Scan. > To: "Grzegorz Jaśkiewicz" <gryzman@xxxxxxxxx> > Cc: pgsql-performance@xxxxxxxxxxxxxx > Date: Tuesday, December 8, 2009, 1:50 PM > > Hi gryzman, > > I have run vacuum full analyze on the cmrules tables. The version of pstgres is 8.2.13. How should I change stats to 100 ? > > Thanks > ________________________________ > From: Grzegorz Jaśkiewicz <gryzman@xxxxxxxxx> > To: niraj patel <npatel@xxxxxxxxxxxx> > Cc: pgsql-performance@xxxxxxxxxxxxxx > Sent: Tue, 8 December, 2009 7:12:49 PM > Subject: Re: Optimizing Bitmap Heap Scan. > > it looks like it might choose wrong plan, cos it gets the stats wrong. > Try increasing number of stats to 100. > Btw, what version it is ? > > > in psql > mydb=# set default_statistics_target = 100; That's only going to affect the current session. To change it permanently, edit postgresql.conf and do pg_ctl reload. ...Robert -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
