On Tue, Jan 20, 2015 at 8:39 PM, Peter Geoghegan <p...@heroku.com> wrote: > On Tue, Jan 20, 2015 at 5:32 PM, Robert Haas <robertmh...@gmail.com> wrote: >> I was assuming we were going to fix this by undoing the abbreviation >> (as in the abort case) when we spill to disk, and not bothering with >> it thereafter. > > The spill-to-disk case is at least as compelling at the internal sort > case. The overhead of comparisons is much higher for tapesort.
First, we need to unbreak this. Then, we can look at optimizing it. The latter task will require performance testing. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
