| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Niels Kristian Schjødt <nielskristian(at)autouncle(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, "pgsql-performance(at)postgresql(dot)org list" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Sudden crazy high CPU usage |
| Date: | 2014-04-03 00:00:09 |
| Message-ID: | CAB7nPqSwJk42PzwEsfJpAgheYiO3w5O8koDrCZQK516azvpRqw@mail.gmail.com |
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| Lists: | pgsql-performance |
On Wed, Apr 2, 2014 at 7:16 AM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> On 2014-03-31 19:16:58 +0200, Niels Kristian Schjødt wrote:
>> Yes, I could install "perf", though I'm not familiar with it. What would i do? :-)
>
> As root:
> perf record -a sleep 5
> perf report > my-nice-perf-report.txt
>
> And then send the my-nice-perf-report.txt file.
>
> Locally it's much nicer to see the output using "perf report" without
> redirect into a file, you'll get an interactive UI.
The Postgres wiki has a page dedicated to perf as well here:
https://wiki.postgresql.org/wiki/Profiling_with_perf
Regards,
--
Michael
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