On 7/15/22 6:52 PM, Andres Freund wrote:
Hi,On 2022-07-15 18:40:11 -0400, Jonathan S. Katz wrote:What I find interesting is the resistance to adding any documentation around this feature to guide users in case they hit the regression. I understand it can be difficult to provide guidance on issues related to adjusting work_mem, but even just a hint in the release notes to say "if you see a performance regression you may need to adjust work_mem" would be helpful. This would help people who are planning upgrades to at least know what to watch out for.If we want to add that as boilerplate for every major release - ok, although it's not really actionable. What I'm against is adding it specifically for this release - we have stuff like this *all the time*, we just often don't bother to carefully find the specific point at which an optimization might hurt. Honestly, if this thread teaches anything, it's to hide relatively minor corner case regressions. Which isn't good.
I think it's OK to discuss ways we can better help our users. It's also OK to be wrong; I have certainly been so plenty of times.
Jonathan
OpenPGP_signature
Description: OpenPGP digital signature
