Re: proposal: simple query profile and tracing API

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

Regards
PAscal




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