Re: Using quicksort for every external sort run - Mailing list pgsql-hackers

Perhaps the right thing to do is report a statistic to pg_stats so
DBAs can see how often sorts are in memory, how often they're on disk,
and how often the on disk sort requires n passes. That would put them
in the same category as "sequential scans" for DBAs that expect the
application to only run index-based OLTP queries for example. The
problem with this is that sorts are not tied to a particular relation
and without something to group on the stat will be pretty hard to act
on.