Hi, On 2018-04-06 07:39:28 -0400, Stephen Frost wrote: > While I tend to agree that it'd be nice to just make it cheaper, that > doesn't seem like something that we'd be likely to back-patch and I tend > to share Heikki's feelings that this is a performance regression we > should be considering fixing in released versions.
I'm doubtful about fairly characterizing this as a performance bug. It's not like we've O(n^2) behaviour on our hand, and if your replay isn't of a toy workload normally that one syscall isn't going to make a huge difference because you've actual IO and such going on. I'm also doubtful that it's sane to just check every 32 records. There's records that can take a good chunk of time, and just continuing for another 31 records seems like a bad idea. Greetings, Andres Freund
