On Wed, May 05, 2021 at 03:04:53PM +0200, Tomas Vondra wrote: > Thanks, that looks promising. I repeated the tests I did on 26/4, and the > results look like this: > > old (0c7d3bb99): 497ms > master: 621ms > patched: 531ms > > So yeah, that's a bit improvement - it does not remove the regression > entirely, but +5% is much better than +25%.
Hmm. Is that really something we should do after feature freeze? A 25% degradation for matview refresh may be a problem for a lot of users and could be an upgrade stopper. Another thing we could do is also to revert 7db0cd2 and 39b66a9 from the v14 tree, and work on a proper solution for this performance problem for matviews for 15~. Thoughts? -- Michael
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