On 29 June 2018 at 11:10, David Rowley <david.row...@2ndquadrant.com> wrote: > On further inspection, the slowdown is coming from the planner in > make_inh_translation_list(). The INSERT path does not hit that since > the planner's job is pretty simple for simple INSERTs.
I've attached a patch that uses SearchSysCacheAttName to speed up these translations in the planner. This puts test 6 more at the level I'd have expected. Here are fresh benchmarks results taken with the attached, again on AWS m5d instance, though probably not the same one as before (fsync=off). Unpatched: Test 1 tps = 922.479156 (excluding connections establishing) Test 2 tps = 334.701555 (excluding connections establishing) Test 3 tps = 327.547316 (excluding connections establishing) Test 4 tps = 1198.924131 (excluding connections establishing) Test 5 tps = 125.130723 (excluding connections establishing) Test 6 tps = 81.511072 (excluding connections establishing) Patched Test 1 tps = 918.105382 (excluding connections establishing) Test 2 tps = 913.315387 (excluding connections establishing) Test 3 tps = 893.578988 (excluding connections establishing) Test 4 tps = 1213.238177 (excluding connections establishing) Test 5 tps = 459.022550 (excluding connections establishing) Test 6 tps = 416.835747 (excluding connections establishing) -- David Rowley http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
v2_speedup_building_tuple_conversion_maps.patch
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