Re: when the startup process doesn't

On Sun, Jun 6, 2021 at 6:23 PM Justin Pryzby <pryzby@telsasoft.com> wrote:
> Should it show the rusage ?  It's shown at startup completion since 10a5b35a0,
> so it seems strange not to show it here.

I don't know, that seems like it's going to make the messages awfully
long, and I'm not sure of what use it is to see that for every report.

I don't like the name very much. log_min_duration_startup_process
seems to have been chosen to correspond to log_min_duration_statement,
but the semantics are different. That one is a threshold, whereas this
one is an interval. Maybe something like
log_startup_progress_interval?

As far as the patch itself goes, I think that the overhead of this
approach is going to be unacceptably high. I was imagining having a
timer running in the background that fires periodically, with the
interval handler just setting a flag. Then in the foreground we just
need to check whether the flag is set. I doubt that we can get away
with a GetCurrentTimestamp() after applying every WAL record ... that
seems like it will be slow.

--
Robert Haas
EDB: http://www.enterprisedb.com