Andres Freund escribió: > Hi, > > On 2013-09-19 14:42:19 +0300, Heikki Linnakangas wrote: > > On 18.09.2013 16:22, Andres Freund wrote: > > >* Why can we do a GetOldestXmin(allDbs = false) in > > > BeginXidLSNRangeSwitch()? > > > > Looks like a bug. I think I got the arguments backwards, was supposed to be > > allDbs = true and ignoreVacuum = false. I'm not sure if vacuums could be > > ignored, but 'false' is the safe option. > > Not sure either...
The "ignoreVacuum" flag specifies to ignore backends running non-full VACUUM, that is, processes that are known never to generate new Xids, never obtain Xmin, and never to insert tuples anywhere. With all these restrictions, I think it's safe to use ignoreVacuum=true here. -- Álvaro Herrera http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
