On Tue, 2014-04-01 at 13:08 -0400, Tom Lane wrote: > I think a patch that stood a chance of getting committed would need to > detect whether the aggregate was being called in simple or grouped > contexts, and apply different behaviors in the two cases.
The simple context doesn't seem like a big problem even if we change things as Tomas suggests: "IMNSHO these are the issues we really should fix - by lowering the initial element count (64->4) and using a single memory context." In the simple context, there's only one context regardless, so the only cost I see is from reducing the initial allocation from 64 to some lower number. But if we're doubling each time, it won't take long to get there; and because it's the simple context, we only need to do it once. Regards, Jeff Davis -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers