[systemd-devel] How to speed up journalctl -n foo ?

Ben Greear greearb at candelatech.com
Wed Jan 14 09:14:25 PST 2015

On 01/14/2015 09:05 AM, Ben Greear wrote:
> I would like to grab the last 2000 or so system log lines after
> some event happens.  I tried this on Fedora-20 (systemd version 208).
> It seems unreasonable slow:
> [root at ath10k lanforge]# time journalctl -n 2000 > /tmp/foo.txt
> real	0m25.618s
> user	0m2.361s
> sys	0m23.197s
> Is there any way to configure things so that this is faster?

For reference, and a slow atom processor system:

[root at ath9k-f ~]# time tail -2000 /var/log/messages > /tmp/foo.txt

real	0m0.005s
user	0m0.002s
sys	0m0.003s


Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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