[systemd-devel] R: Re: Slow startup of systemd-journal on BTRFS

[Goffredo Baroncelli <kreijack@libero.it>]

>----Messaggio originale----
>Da: russell at coker.com.au
>Data: 12/06/2014 3.18
>A: <kreijack at inwind.it>
>Cc: "systemd Mailing List"<systemd-devel at lists.freedesktop.org>, "linux-btrfs"
<linux-btrfs at vger.kernel.org>
>Ogg: Re: Slow startup of systemd-journal on BTRFS
>
>On Wed, 11 Jun 2014 23:28:54 Goffredo Baroncelli wrote:
>>         https://bugzilla.redhat.com/show_bug.cgi?id=1006386
>> 
>> suggested me that the problem could be due to a bad interaction between
>> systemd and btrfs. NetworkManager was innocent.  It seems that
>> systemd-journal create a very hight fragmented files when it stores its
>> log. And BTRFS it is know to behave slowly when a file is highly
>> fragmented. This had caused a slow startup of systemd-journal, which in
>> turn had blocked the services which depend by the loggin system.
>
>On my BTRFS/systemd systems I edit /etc/systemd/journald.conf and put 
>"SystemMaxUse=50M".  That doesn't solve the fragmentation problem but 
reduces 
>it enough that it doesn't bother me.

IIRC my log files are about 80/100MB. So I am not sure if this could help.
I want to investigate also the option

    MaxFileSec=1d

which rotates the log file once a day (or a week)

>
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