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 +

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