Re: systemd "journalctl" is 1.89sec on ext4, 1.49 min on btrfs

[Sergei Trofimovich <slyich@gmail.com>]

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On Mon, 27 May 2013 18:21:21 +0200
Szőts Ákos <szotsaki@gmail.com> wrote:

> Dear list,
> 
> I have two openSUSE 12.3 systems with kernel 3.9. On one of them there's an 
> ext4 partition, while on the other there's a btrfs.
> 
> I issued a "time journalctl -b --no-pager" command on both systems. This shows 
> the logs from the current boot without passing them to "less".
> 
> On ext4 (3.9.3):
> real    0m1.898s
> user    0m0.291s
> sys     0m0.105s
> 
> On btrfs (3.9.2):
> real    1m49.698s
> user    0m0.102s
> sys     0m0.470s
> 
> Journalctl on btrfs was always this slow, some btrfsck were made on the file 
> system too, but I don't think it was corrupted. On just the first run it's 
> sluggish, after it's fast as the ext4 one.
> 
> Is it a known issue or can I help somehow debugging this further?

Let's look at your
    /usr/sbin/filefrag /var/log/journal/*/*
on both systems

-- 

  Sergei

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