From: Goffredo Baroncelli <kreijack@gmail.com>
To: "Swâmi Petaramesh" <swami@petaramesh.org>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: BTRFS, getting darn slower everyday
Date: Mon, 08 Oct 2012 18:46:23 +0200 [thread overview]
Message-ID: <5073035F.6000600@gmail.com> (raw)
In-Reply-To: <5072F63B.5060608@petaramesh.org>
On 10/08/2012 05:50 PM, Swâmi Petaramesh wrote:
> Hi again Goffredo,
>
> Le 08/10/2012 13:38, Goffredo Baroncelli a écrit :
>> I fear that both the combination of autodefrag and the high number of
>> snapshot could be the root-cause of the the bad performance.
> I've removed, on one of my machines, all snapshots but three per subvol
> (keeping the oldests and newest), going from about 30 per subvol to 3,
> for the complete filesystem from 120+ to about a dozen.
>
> Then I let btrfs-cleaner do its job
>
> After that the machine boots to GUI in a bit less than 2 minutes, where
> it was more than 4 minutes previously.
>
> The machine now seems much more reactive and swift.
>
> So it seems that the number or active snapshots (or is it the number of
> subvols whatsoever ??) dramatically impacts performance...
Does the autodefrag options still alive ?
I believe that the snapshot is quite cheap, except if you update the
shared files one at time. Which should be the case of the autodefrag.
But it is only a my supposition....
Could you please try to avoid the autodefrag option in a machine with an
high number of snapshot ? I am curios...
>
> Thanks for the suggestion.
>
next prev parent reply other threads:[~2012-10-08 16:46 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 [this message]
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
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=5073035F.6000600@gmail.com \
--to=kreijack@gmail.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.