Re: Exposing the Xact commit order to the user

Could you generate the commit-order log by simply registering a commit 
hook (RegisterXactCallback(XACT_EVENT_COMMIT)) that writes such a log 
somewhere in the data directory? That would work with older versions 
too, no server changes required.

It would not get called during recovery, but I believe that would be 
sufficient for Slony. You could always batch commits that you don't know 
when they committed as if they committed simultaneously.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com