On Sat, 2009-11-21 at 23:00 +0200, Heikki Linnakangas wrote: > Tom Lane wrote: > > Heikki Linnakangas <heikki.linnakan...@enterprisedb.com> writes: > >> Tom Lane wrote: > >>> There's no equivalent of XLogArchivingActive()? > > > >> XLogArchivingMode() == false enables us to skip WAL-logging in > >> operations like CLUSTER or COPY, which is a big optimization. I don't > >> see anything like that in Hot Standby. There is a few small things that > >> could be skipped, but nothing noticeable. > > > > Huh? Surely HS requires XLogArchivingMode as a prerequisite ... > > Oh, sure! But there's no switch that needs to be enabled in the master > in addition to that.
We've tried hard to have it "just work". But I wonder whether we should have a parameter to allow performance testing on the master? If nobody finds any issues then we can remove it again, or at least make it a hidden developer option. -- Simon Riggs www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
