On Sun, Feb 22, 2015 at 1:30 PM, Peter Geoghegan <p...@heroku.com> wrote: > You should try it with the data fully sorted like this, but with one > tiny difference: The very last tuple is out of order. How does that > look?
Another thing that may be of particular interest to you as a Czech person is how various locales perform. I believe that the collation rules of Czech and Hungarian are particularly complex, with several passes often required for strcoll() (I think maybe more than 4). You should either measure that, or control for it. I was prepared to attribute the differences in the two systems to differences in compute bandwidth between the CPUs involved (which are perhaps more noticeable now, since memory latency is less of a bottleneck). However, the inconsistent use of collations could actually matter here. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
