On Tue, 2008-11-18 at 20:34 +0100, Jakub M wrote: > Also, I am running MRT from /etc/cron.d as multiple entries every 5 > minutes - is it OK? I mean, I have dozens of entries in cron.d,
you are, therefore, loading dozens of copies of perl every 5 minutes. That chews up ram, and if you run out, then the box swaps. swapping is bad for performance. > maybe > it is better to run it as a single MRTG run (with a terribly long > command line?) No, my command line is very short: [EMAIL PROTECTED] cfg]$ sudo cat /etc/cron.d/mrtg */5 * * * * mrtg /usr/local/bin/mrtg /var/mrtg/cfg/mrtg.cfg --logging=mrtg.log but mrtg.cfg is very large. It is full of Include: statements, e.g: Include: /var/mrtg/cfg/common.cfg Include: /var/mrtg/cfg/sitea/sitea-router1.cfg Include: /var/mrtg/cfg/sitea/sitea-router2.cfg Include: /var/mrtg/cfg/sitea/sitea-ups1.cfg ... In common.cfg, I have all of the standard things, like LogDir:, HtmlDir: and ImageDir:, the forks: declaration, and LogFormat: rrdtool mrtg farms out the polling amongst the 30 forks, then does the disk writes sequentially so as to minimize disk collisions. -- Daniel J McDonald, CCIE #2495, CISSP #78281, CNX Austin Energy http://www.austinenergy.com
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