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Re: [Xen-users] monitoring with MRTG
| To: | xen-users@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-users] monitoring with MRTG |
| From: | Andy Smith <andy@xxxxxxxxxxxxxx> |
| Date: | Fri, 23 Nov 2007 18:50:33 +0000 |
| Delivery-date: | Sat, 24 Nov 2007 17:21:03 -0800 |
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On Fri, Nov 23, 2007 at 05:47:38PM +1100, James Harper wrote: > Has anyone written any MRTG scripts for monitoring domain CPU usage? I have written scripts to dump cpu usage to a file, which I then monitor with cacti. > It's probably pretty simple to do, but there's not much point > re-inventing the wheel. It's very simple, so much so that there's not much point in publishing it: - Periodically (e.g. every 5 minutes) parse the cpu time out of xm list --long. That is a simple counter. MRTG and other monitoring software knows how to turn ever-increasing counters into a rate of increase. - Take the rate of increase in e.g. CPU milliseconds per 5 minutes, and divide that by 300,000 (the number of milliseconds in 5 minutes). That leaves you with percentage CPU use of every domain. Hope that helps. Cheers, Andy
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