On Monday, February 13, 2012 02:08:08 PM Robert Haas wrote: > On Sat, Feb 11, 2012 at 4:23 AM, Simon Riggs <si...@2ndquadrant.com> wrote: > > Yeh, I was thinking we would do well to implement cached sequences for > > say first 1000 sequences. > > Another option might be to store all the sequences for a particular > database in a single underlying data file. The current implementation > uses a whole page for a single tuple that is presumably much smaller > than that. So when you create a sequence "foo", it's really creating > a row in some new system catalog pg_sequences, or something like that. I wonder if the tigher packing would be noticeable contentionwise.... If several hot sequences end up in a single page that could end up being measurable.
Andres -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers