From: Mck <mick@wever.org>
To: Nirbheek Chauhan <nirbheek@gentoo.org>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Applications using fsync cause hangs for several seconds every few minutes
Date: Mon, 18 Jul 2011 17:37:18 +0000 [thread overview]
Message-ID: <1311010638.6713.5.camel@localhost> (raw)
In-Reply-To: <BANLkTimMv_MMVmsJeVvr_1_wEVam1WZ6BA@mail.gmail.com>
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On Tue, 2011-06-07 at 04:28 +0530, Nirbheek Chauhan wrote:
> Every few minutes, (I guess) when applications do fsync (firefox,
> xchat, vim, etc), all applications that use fsync() hang for several
> seconds, and applications that use general IO suffer extreme
> slowdowns. iotop shows various combinations of the processes listed
> below doing writes, and the total write as 2-3MB/s.
I have experienced this too. It /seemed/ to help removing a lot of
snapshots (i have hundreds that i didn't really need).
Would it be stupid to try disabling fsync like described at
http://ubuntuforums.org/archive/index.php/t-1103926.html ?
I don't know of the consequences... but it would prove your theory?
~mck
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next prev parent reply other threads:[~2011-07-18 17:37 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-06 22:58 Applications using fsync cause hangs for several seconds every few minutes Nirbheek Chauhan
2011-07-18 17:37 ` Mck [this message]
2011-07-18 18:17 ` Josef Bacik
2011-07-20 20:59 ` Nirbheek Chauhan
2011-08-03 15:50 ` mck
-- strict thread matches above, loose matches on Subject: below --
2011-06-21 11:15 Jan Stilow
2011-08-09 21:29 Andrew Guertin
2011-08-12 1:13 ` Andrew Guertin
2011-08-18 14:38 ` Chris Mason
2011-08-20 17:18 ` Andrew Guertin
2011-08-17 14:24 ` Andrew Guertin
2011-08-17 14:29 ` Michael Cronenworth
2011-08-17 14:38 ` Andrew Guertin
2011-08-17 14:55 ` Dave
2011-08-18 2:41 ` Anand Jain
2011-08-18 6:44 ` youagree
2011-08-18 7:29 ` Andrew Guertin
2011-08-18 7:55 ` youagree
2011-08-18 11:45 ` Andrew Guertin
2011-08-19 9:58 ` Anand Jain
2011-08-18 7:41 ` Andrew Guertin
2011-08-18 6:47 ` Chris Samuel
2011-08-18 6:58 ` youagree
2011-08-19 7:34 ` Chris Samuel
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