From: Shridhar Daithankar <ghodechhap@ghodechhap.net>
To: yzb3@wp.pl
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Btrfs might be gradually slowing the boot process
Date: Sat, 09 Nov 2013 02:08:08 +0630 [thread overview]
Message-ID: <1665274.eaCj6Je1We@bheem> (raw)
In-Reply-To: <527d2ee689e077.81319728@wp.pl>
On Friday, November 08, 2013 07:35:18 PM yzb3@wp.pl wrote:
> Hello,
>
> I recently noticed that my boot has become slower - it took around 29s,
> while at the beginning it was ~6s. I thought it was an issue with systemd,
> because it failed to properly indicate at which stage the slowdown occurred
> and how long it took. I rolled back to a pretty fresh root subvolume and
> the boot was fast again. However, after several reboots it started lagging
> again (10s? preposterous!). I decided to try the *clear_cache* mount
> option; it was only a guess, but it did speed the boot to the proper ~6s.
>
> The question is - why? My filesystem is really small - I see no reason for a
> 5x boot slowdown. Is this a known issue? I will be glad to give any
> additional details about my fs.
Have you tried defragmenting everything, including directory objects? despite
of small amount of data, it could be massively fragmented, slowing down
everything.
HTH
--
Regards
Shridhar
next prev parent reply other threads:[~2013-11-08 20:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-08 18:35 Btrfs might be gradually slowing the boot process yzb3
2013-11-08 19:38 ` Shridhar Daithankar [this message]
2013-11-09 10:57 ` Kai Krakow
2013-11-10 4:53 ` Chris Murphy
2013-11-10 11:14 ` Duncan
2013-11-10 12:54 ` Russell Coker
2013-11-10 16:07 ` Kai Krakow
2013-11-10 16:09 ` Hugo Mills
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