On Wed, May 2, 2018 at 10:43 AM, Heikki Linnakangas <hlinn...@iki.fi> wrote: > Independently of this, perhaps we should put in special case in > dumptuples(), so that it would never create a run with fewer than maxTapes > tuples. The rationale is that you'll need to hold that many tuples in memory > during the merge phase anyway, so it seems silly to bail out before that > while building the initial runs. You're going to exceed work_mem by the > roughly same amount anyway, just in a different phase. That's not the case > in this example, but it might happen when sorting extremely wide tuples.
-1 from me. What about the case where only some tuples are massive? -- Peter Geoghegan
