From: Josef Bacik <jbacik@fusionio.com>
To: "Swâmi Petaramesh" <swami@petaramesh.org>
Cc: "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>
Subject: Re: BTRFS, getting darn slower everyday
Date: Mon, 8 Oct 2012 12:09:33 -0400 [thread overview]
Message-ID: <20121008160933.GA2259@localhost.localdomain> (raw)
In-Reply-To: <50714AC8.4010100@petaramesh.org>
On Sun, Oct 07, 2012 at 03:26:32AM -0600, Swâmi Petaramesh wrote:
> Hi,
>
> I have 4 machines, all converted to BTRFS about 6 months ago, now all
> running Ubuntu Quantal with kernel 3.5.0-17
>
> The matter is that all these machines are now getting slower and slower
> everyday, every disk access causing the disk to be 100% busy for long
> periods, to the point that I'm now seriously considering migrating
> everything back to ext4...
>
> From the start BTRFS was "not very fast", still satisfactory, but now it
> becomes truly unusable.
>
> On one machine, I know have a typical complete boot time to a usable GUI
> that is over 4 minutes, with the HD still very busy for a couple more
> minutes afterwards, where it used to be around 35-40 seconds in ext4 !
>
> Is there anything I could do to speed things back (without losing all my
> snapshots or doubling the size of data on disk)...?
>
> I already had made the move back from BTRFS to ext4 about 18 months ago,
> I found it had improved so was back to BTRFS, and I wouldn't have to
> revert back again :-/
>
> Any advice or help greatly appreciated.
>
Can you get sysrq+w when you are seeing slowness? Usually bootup slow times
means you don't have space_cache enabled or your cache is being evicted for some
reason, can you check dmesg after bootup for messages related to space cache?
Thanks,
Josef
next prev parent reply other threads:[~2012-10-08 16:09 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-07 9:26 BTRFS, getting darn slower everyday Swâmi Petaramesh
2012-10-07 10:59 ` Martin Steigerwald
2012-10-07 14:05 ` Swâmi Petaramesh
2012-10-07 14:48 ` Martin Steigerwald
2012-10-08 6:16 ` Swâmi Petaramesh
2012-12-09 5:17 ` Jan Engelhardt
2012-12-09 10:13 ` Martin Steigerwald
2012-12-09 10:41 ` Roman Mamedov
2012-12-09 11:20 ` Swâmi Petaramesh
2012-12-09 11:38 ` Hugo Mills
2012-12-09 22:51 ` Bob Marley
2012-12-09 14:38 ` Jan Engelhardt
2012-10-07 11:02 ` Martin Steigerwald
2012-10-07 12:33 ` Alex
2012-10-07 13:19 ` Swâmi Petaramesh
2012-10-07 14:44 ` Martin Steigerwald
2012-10-07 22:47 ` Goffredo Baroncelli
2012-10-08 6:08 ` Swâmi Petaramesh
2012-10-08 11:38 ` Goffredo Baroncelli
2012-10-08 13:36 ` Swâmi Petaramesh
2012-10-08 15:50 ` Swâmi Petaramesh
2012-10-08 16:46 ` Goffredo Baroncelli
2012-10-08 6:22 ` Swâmi Petaramesh
2012-11-14 16:17 ` Peter Maloney
2012-10-07 13:00 ` Martin Steigerwald
2012-10-07 13:14 ` Swâmi Petaramesh
2012-10-07 14:41 ` Martin Steigerwald
2012-10-08 16:09 ` Josef Bacik [this message]
2012-10-08 16:15 ` Swâmi Petaramesh
2012-10-08 16:31 ` Josef Bacik
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=20121008160933.GA2259@localhost.localdomain \
--to=jbacik@fusionio.com \
--cc=linux-btrfs@vger.kernel.org \
--cc=swami@petaramesh.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).