Re: proposal: simple query profile and tracing API

st 14. 11. 2018 v 14:06 odesílatel legrand legrand <
legrand_legrand(at)hotmail(dot)com> napsal:

> Pavel Stehule wrote
> > út 13. 11. 2018 v 20:38 odesílatel Tomas Vondra <
>
> > tomas.vondra@
>
> >> napsal:
> >
> > My idea is very simple.
> >
> > 1. continual collect of data - planning start, execution start, waiting
> > start, waiting end, query end
> >
> > 2. run a some callback function after query is finished. Collected data
> > will be passed there.
> >
> > I think so anybody can do some different with these data. Sometimes only
> > sum can be ok, sometimes you need to increment some sorted counts,
> > sometimes you need to store these data for median or percentil
> > calculation.
> >
> > I think so it can be very simple and fast, because you should to work
> with
> > just one metrics vector.
>
> the same idea was already proposed for planning time in pg_stat_statements
> by Thomas
>
> https://www.postgresql-archive.org/Planning-counters-in-pg-stat-statements-tt5990933.html#a6002416

Should not be original every time :)

Regards

Pavel

>
> Regards
> PAscal
>
>
>
>
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