Re: pgstat_send_connstats() introduces unnecessary timestamp and UDP overhead

On Fri, 2021-08-27 at 13:57 +0900, Michael Paquier wrote:
> > I think in that case we'd have to do the bigger redesign and move "live"
> > connection stats to backend_status.c...
> 
> Hmm.  A redesign is not really an option for 14 at this stage.  And I
> am not really comfortable with the latest proposal from upthread to
> plug in that to pgstat_send_tabstat to report things once per
> transaction, either.  It really looks like this needs more thoughts,
> and it would mean that a revert may be the most appropriate choice
> for the moment.  That's the last-resort option, surely, but we are
> post-beta3 so there is no much margin left.

In the view of that, how about doubling PGSTAT_STAT_INTERVAL to 1000
milliseconds?  That would mean slightly less up-to-date statistics, but
I doubt that that will be a problem.  And it should even out the increase
in statistics messages, except in the case of lots of short-lived
sessions.  But in that scenario you cannot have session statistics
without lots of extra messages, and such a workload has enough performance
problems as it is, so I don't think we have to specifically worry about it.

Yours,
Laurenz Albe