| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Kevin Grittner <kgrittn(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: exposing wait events for non-backends (was: Tracking wait event for latches) |
| Date: | 2017-03-09 21:41:51 |
| Message-ID: | 20170309214151.lwwyd35p7dtixzc4@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
On 2017-03-09 16:37:29 -0500, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> > On Thu, Mar 9, 2017 at 2:30 PM, Peter Eisentraut
> > <peter(dot)eisentraut(at)2ndquadrant(dot)com> wrote:
> >> In practice, I think it's common to do a quick select * from
> >> pg_stat_activity to determine whether a database instance is in use.
>
> > I thought of the same kind of thing, and it was discussed upthread.
> > There seemed to be more votes for keeping it all in one view, but that
> > could change if more people vote.
>
> I've not been paying much attention to this thread, but it seems like
> something that would help Peter's use-case and have other uses as well
> is a new column that distinguishes different process types --- user
> session, background worker, autovacuum worker, etc.
The patches upthread add precisely such a column.
Andres
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