On Fri, Jul 30, 2021 at 4:00 PM Andres Freund <and...@anarazel.de> wrote: > I don't agree with that? If (user+system) << wall then it is very likely > that recovery is IO bound. If system is a large percentage of wall, then > shared buffers is likely too small (or we're replacing the wrong > buffers) because you spend a lot of time copying data in/out of the > kernel page cache. If user is the majority, you're CPU bound. > > Without user & system time it's much harder to figure that out - at > least for me.
Oh, that's an interesting point. At least now I'll know why I am supposed to care about that log line the next time I see it. I guess we could include both things, though the line might get a little long. Or maybe there's some other subset that would make sense. -- Robert Haas EDB: http://www.enterprisedb.com
