On 14 March 2018 at 11:36, Andrew Dunstan <andrew.duns...@2ndquadrant.com> wrote: > Here are the benchmark results from the v15 patch. Fairly similar to > previous results. I'm going to run some profiling again to see if I > can identify any glaring hotspots. I do suspect that the "physical > tlist" optimization sometimes turns out not to be one. It seems > perverse to be able to improve a query's performance by dropping a > column.
Can you explain what "fdnmiss" is that appears in the results? -- David Rowley http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services