From: Jagdish Motwani <jagdish.motwani@elitecore.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f )
Date: Fri, 21 Sep 2012 19:17:56 +0530 [thread overview]
Message-ID: <505C700C.3010403@elitecore.com> (raw)
Recently i upgraded my kernel from 2.6.29.6 to 2.6.35.14.
After upgrading i got very poor performance on my postgre database.
My test.sql contains 10000 postgre insert query
Linux 2.6.29.6
time psql -U user -d database -f test.sql > /dev/null
real 0m 7.23s
user 0m 0.38s
sys 0m 0.12s
Linux 2.6.35.14
# time psql -U user -d database -f test.sql > /dev/null
real 1m 4.05s
user 0m 0.44s
sys 0m 0.12
I even tried Linux 3.5.4 and got similar results.
Using git bisect, i got commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f
Is it a behavior change or am i missing something? Are there any
workarounds for this?
Regards,
Jagdish Motwan
next reply other threads:[~2012-09-21 13:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 13:47 Jagdish Motwani [this message]
2012-09-21 14:17 ` performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f ) Jeff Moyer
2012-09-21 14:25 ` performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f) Andres Freund
2012-09-24 5:45 ` Jagdish Motwani
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=505C700C.3010403@elitecore.com \
--to=jagdish.motwani@elitecore.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).