On Thu, Mar 29, 2012 at 3:04 PM, Marko Kreen <mark...@gmail.com> wrote: > On Thu, Mar 29, 2012 at 02:46:23PM +0100, Simon Riggs wrote: >> On Thu, Mar 29, 2012 at 12:06 PM, Simon Riggs <si...@2ndquadrant.com> wrote: >> > Patch coming in a few hours. >> >> This is more straightforward than I was thinking. We just need to >> initialise XLogCtl at the right place. > > Looks good to me. That should fix the problem with standbys then. > > > Next question: how can flipping archive_mode on and off, > with restarts, near wraparound point, break epoch on master? > > http://lists.pgfoundry.org/pipermail/skytools-users/2012-March/001609.html > > Any ideas? > > Could WAL playback from backend with different archive_mode setting > cause it somehow?
The current code would allow it, if you managed to go for 4 billion xids between checkpoints. If that happened, it would give an off by one error each time it happened. I don't believe that is possible. -- Simon Riggs 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
