From: Andrea Suisani <sickpig@opinioni.net>
To: pgsql-performance@postgresql.org
Subject: Re: 20% performance drop on PostgreSQL 9.2 from kernel 3.5.3 to 3.6-rc5 on AMD chipsets
Date: Wed, 03 Oct 2012 13:45:54 +0200
Message-ID: <506C2572.2040505@opinioni.net> (raw)
In-Reply-To: <5058264D.5090702@opinioni.net>
References: <CA+Medizd1nfzQfC284x2-BwsCz+M80YZ6NfRMcXtKhPDdD1KqQ@mail.gmail.com>
<CAAZKuFbpifOgV3XCENTvkP30VCb0rOBv799D2_srJ6ujCACtkQ@mail.gmail.com>
<5058264D.5090702@opinioni.net>
Hi
On 09/18/2012 09:44 AM, Andrea Suisani wrote:
> On 09/14/2012 10:45 AM, Daniel Farina wrote:
>> On Fri, Sep 14, 2012 at 12:40 AM, Nikolay Ulyanitsky <lystor@gmail.com> wrote:
>>> Hi
>>> I compiled the 3.6-rc5 kernel with the same config from 3.5.3 and got
>>> the 15-20% performance drop of PostgreSQL 9.2 on AMD chipsets (880G,
>>> 990X).
>
> [cut]
>
>>> Kernel config - http://pastebin.com/cFpg5JSJ
>>>
>>> Any ideas?
>>
>> Did you tell LKML? It seems like a kind of change that could be found
>> using git bisect of Linux, albiet laboriously.
>
>
> just a pointer to LKML thread:
>
> https://lkml.org/lkml/2012/9/14/99
[cut]
today Jonathan Corbet has posted a good write-up on lwn.net
"How 3.6 nearly broke PostgreSQL"
http://lwn.net/SubscriberLink/518329/672d5c68286f9c18/
this is definitely a worth reading piece.
Andrea
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-performance@postgresql.org
Cc: sickpig@opinioni.net
Subject: Re: 20% performance drop on PostgreSQL 9.2 from kernel 3.5.3 to 3.6-rc5 on AMD chipsets
In-Reply-To: <506C2572.2040505@opinioni.net>
* 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