On Tue, Oct 19, 2010 at 5:42 PM, Andrew Dunstan <andrew@dunslane.net> wrote:
> Well a bit more testing shows some benefit. I've sorted out a few kinks, so
> this seems to work. In particular, with the above tables, the version
> imported from 9.0 can create have an index created in about the same time as
> on the fresh table (identical data, but all even numbered Oids).
>
> Of course, with lots of odd numbered Oids, if a label gets added the
> imported version will degrade in performance much more quickly.
I'm quite impressed by the amount of time and thought being put into
optimizing this. I didn't realize people cared so much about enum
performance; but it's good that they do.
I hope to see more such efforts in other parts of the system.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company