On Mon, Aug 8, 2016 at 06:34:46PM +0530, Amit Kapila wrote: > I think here expensive part would be recheck for the cases where the > index value is changed to a different value (value which doesn't exist > in WARM chain). You anyway have to add the new entry (key,TID) in > index, but each time traversing the WARM chain would be an additional > effort. For cases, where there are just two index entries and one > them is being updated, it might regress as compare to what we do now.
Yes, I think the all-increment or all-decrement WARM chain is going to be the right approach. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription + -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers