On Sat, May 30, 2015 at 3:46 PM, Peter Geoghegan <p...@heroku.com> wrote: >> What, in this release, could break things badly? RLS? Grouping sets? >> Heikki's WAL format changes? That last one sounds really scary to me; >> it's painful if not impossible to fix the WAL format in a minor >> release. > > I think we actually have learned some lessons here. MultiXacts were a > somewhat unusual case for a couple of reasons that I need not rehash. > > In contrast, Heikki's WAL format changes (just for example) are > fundamentally just a restructuring to the existing format. Sure, there > could be bugs, but I think that it's fundamentally different to the > 9.3 MultiXact stuff, in that the MultiXact stuff appears to be > stubbornly difficult to stabilize over months and years. That feels > like something that is unlikely to be true for anything that made it > into 9.5.
I hope you're right. But I don't think any of us foresaw just how bad the MultiXact thing was likely to be either. In fact, I think to some extent we may STILL be in denial about how bad it is. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
