pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Васильев Дмитрий <d.vasilyev@postgrespro.ru>
Cc: Andres Freund <andres@anarazel.de>
Cc: pgsql-hackers@postgresql.org
Subject: Re: Performance degradation in commit ac1d794
Date: Fri, 25 Dec 2015 13:10:23 -0500
Message-ID: <19322.1451067023@sss.pgh.pa.us> (raw)
In-Reply-To: <CAB-SwXb1p6W-_Qrd=h=c47Tv1DuWJwLYNWyq8j9g2yRp4ye-BQ@mail.gmail.com>
References: <CAB-SwXZh44_2ybvS5Z67p_CDz=XFn4hNAD=CnMEF+QqkXwFrGg@mail.gmail.com>
	<EA5F5A26-2E66-4CAB-B3EC-EAD65501B74B@anarazel.de>
	<CAB-SwXZ+6==ZmGvME9vKtUExaQuYYf6oRUNBjkg5SYqv267dUQ@mail.gmail.com>
	<9F7A592C-323B-40CF-AEB6-20D28EAEFFDD@anarazel.de>
	<CAB-SwXb1p6W-_Qrd=h=c47Tv1DuWJwLYNWyq8j9g2yRp4ye-BQ@mail.gmail.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

=?UTF-8?B?0JLQsNGB0LjQu9GM0LXQsiDQlNC80LjRgtGA0LjQuQ==?= <d.vasilyev@postgrespro.ru> writes:
> ​ Samples: 1M of event 'cycles', Event count (approx.): 816922259995, UID:
> pgpro
>   Overhead  Shared Object       Symbol

>   69,72%  [kernel]            [k] _raw_spin_lock_irqsave
>   1,43%  postgres            [.] _bt_compare
>    1,19%  postgres            [.] LWLockAcquire
>    0,99%  postgres            [.] hash_search_with_hash_value
>    0,61%  postgres            [.] PinBuffer

Seems like what you've got here is a kernel bug.

			regards, tom lane


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (93+ messages)  latest in thread

Message-ID: <19322.1451067023@sss.pgh.pa.us>
Permalink:  ../19322.1451067023@sss.pgh.pa.us/
Also on:    postgresql.org/message-id/19322.1451067023@sss.pgh.pa.us

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: tgl@sss.pgh.pa.us, d.vasilyev@postgrespro.ru, andres@anarazel.de
  Subject: Re: Performance degradation in commit ac1d794
  In-Reply-To: <19322.1451067023@sss.pgh.pa.us>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox