On Wed, Nov 13, 2013 at 7:33 AM, Simon Riggs <si...@2ndquadrant.com> wrote: > On 13 November 2013 09:31, Leonardo Francalanci <m_li...@yahoo.it> wrote: >> I would like to see some numbers. > > Alvaro has given me some results for his patch. The figures I have are > for a 2GB table. > > Index Build Time > MinMax 11 s > Btree 96s > > Index Size > MinMax 2 pages + metapage > Btree approx 200,000 pages + metapage > > Load time > MinMax no overhead, same as raw COPY > BTree - considerably slower > > Index SELECT > Slower for small groups of rows > Broadly same for large requests (more results required on that assessment) > > I expect to publish results against TPC-H cases in next few weeks. > > Additional tests are welcome for other use cases.
Those are pretty exciting numbers. These days for analytics work I'm using mostly covering index type approaches. I bet the tiny index would more than offset the extra heap accesses. Can you CLUSTER against a minmax index? merlin -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers