On Thu, Dec 5, 2019 at 1:12 PM Bruce Momjian <br...@momjian.us> wrote: > I agree with Stephen's request. We have been waiting for the executor > rewrite for a while, so let's just do something simple and see how it > performs.
I'm sympathetic to the frustration here, and I think it would be great if we could find a way forward that doesn't involve waiting for a full rewrite of the executor. However, I seem to remember that when we tested the various patches that various people had written for this feature (I wrote one, too) they all had a noticeable performance penalty in the case of a plain old Append that involved no FDWs and nothing asynchronous. I don't think it's OK to have, say, a 2% regression on every query that involves an Append, because especially now that we have partitioning, that's a lot of queries. I don't know whether this patch has that kind of problem. If it doesn't, I would consider that a promising sign. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
