david@xxxxxxx wrote:
On Wed, 6 Jun 2007, Steinar H. Gunderson wrote:
On Tue, Jun 05, 2007 at 05:59:25PM -0400, Tom Lane wrote:
I think the main argument for partitioning is when you are interested in
being able to drop whole partitions cheaply.
Wasn't there also talk about adding the ability to mark individual
partitions
as read-only, thus bypassing MVCC and allowing queries to be satisfied
using
indexes only?
Not that I think I've seen it on the TODO... :-)
now that's a very interesting idea, especially when combined with
time-based data where the old times will never change.
That's been discussed, but it's controversial. IMHO a better way to
achieve that is to design the dead-space-map so that it can be used to
check which parts of a table are visible to everyone, and skip
visibility checks. That doesn't require any user action, and allows updates.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
