On Mon, Jun 8, 2020 at 12:09 PM Robert Haas <robertmh...@gmail.com> wrote: > I think the big overhead is that you log the old version of each row's > primary key (or whatever the replica identity is) when performing an > UPDATE or DELETE. So if you test it with integer keys probably it's > not bad, and I suspect (though I haven't looked) that we don't do the > extra logging when they key hasn't changed. But if you have wide text > columns as keys and you update them a lot then things might not look > so good. I think in the bad cases for this feature the overhead is > vastly more than going from minimal to replica. > > As many people here probably know, I am in general skeptical of this > kind of change. It's based on the premise that reconfiguring the > system is either too hard for users to figure out, or too disruptive > because they'll need a restart.
I completely agree with your analysis, and your conclusions. -- Peter Geoghegan
