Re: Wait profiling

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От Alvaro Herrera
Тема Re: Wait profiling
Дата
Msg-id 20200710203713.GA2569@alvherre.pgsql
обсуждение исходный текст
Ответ на Wait profiling  (Daniel Wood <hexexpert@comcast.net>)
Ответы Re: Wait profiling  (Julien Rouhaud <rjuju123@gmail.com>)
Список pgsql-hackers
On 2020-Jul-10, Daniel Wood wrote:

> After nearly 5 years does something like the following yet exist?
> https://www.postgresql.org/message-id/559D4729.9080704@postgrespro.ru

Yes, we have pg_stat_activity.wait_events which implement pretty much
what Ildus describes there.

> 1) An option to "explain" to produce a wait events profile.
> postgres=# explain (analyze, waitprofile) update pgbench_accounts set bid=bid+1 where aid < 2000000;
> ...
> Execution time: 23111.231 ms

There's an out-of-core extension, search for pg_wait_sampling.  I
haven't tested it yet ...

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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