Andres Freund <and...@anarazel.de> writes: > On 2017-02-23 17:28:26 -0500, Tom Lane wrote: >> Maybe it's time to convert that to a doubly-linked list.
> Yes, I do think so. Given that we only have that for full blocks, not > for small chunks, the cost seems neglegible. > That would also, partially, address the performance issue > http://archives.postgresql.org/message-id/d15dff83-0b37-28ed-0809-95a5cc7292ad%402ndquadrant.com > addresses, in a more realistically backpatchable manner. Yeah, I was wondering if we could get away with back-patching such a change. In principle, nothing outside aset.c should know what's in the header of an AllocBlock, but ... > Jeff, do you have a handy demonstrator? A solid test case would definitely help to convince people that it was worth taking some risk here. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
