Hi, On 2016-10-09 21:51:07 -0700, Josh Berkus wrote: > Given that hot_standby_feedback is pretty bulletproof now, and a lot of > the work in reducing replay conflicts, I think the utility of > vacuum_defer_cleanup_age is at an end. I really meant so submit a patch > to remove it to 9.6, but it got away from me.
HS feedback doesn't e.g. work well with delayed and/or archived replay, whereas defer_cleanup does. On the other hand, removing it would make some of the reasoning around GetOldestXmin() a bit easier. Andres -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers