Andres Freund wrote: > I think this patch is a seriously bad idea. For one, it's not actually > doing anything about the problem - the tuple can be accessed without > freezing getting involved.
Normal access other than freeze is not a problem, because other code paths do check for HEAP_XMAX_INVALID and avoid access to Xmax if that's set. > For another, it will increase wall traffic for freezing of short lived > tuples considerably, without any benefit. True. I didn't actually try to run this; it was just for demonstration purposes. It'd need some cooperation from heap_tuple_needs_freeze in order to work at all, for one thing. -- 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
