[Users] Dstat plugin for OpenVZ CPU statistics

[José David Bravo Álvarez]

Hi Dag,

Good work, its great.

José David Bravo

Dag Wieers escribió:
> Hi,
>
> I've just written a small dstat plugin to monitor CPU usage per VE. You 
> can find the plugin in the dstat subversion repository linked from:
>
> 	http://dag.wieers.com/home-made/dstat/
>
> Dstat is much like vmstat, but modular and versatile. So you can extend it 
> with whatever counters you want to visualize, next to other counters. This 
> helps to relate counters and find/troubleshoot bottlenecks.
>
> This plugin can help to find the most consuming VE, or visualize how VE's 
> are matching up to each other (and the system CPU usage).
>
> I don't know whether the nice-value in /proc/vz/vestat is ever used (maybe 
> I shouldn't add it in the list of counters).
>
> I also don't know what other information in /proc/vz would be interesting 
> to vizualise (over a timeframe). I'm willing to add more plugins in dstat 
> for openvz if I know how to make more sense of the current counters (and 
> their usefulness). Feedback from developers welcome :)
>
> Visually it looks like this (without colors though):
>
> [root at itmphys01 dstat]# ./dstat -M cpu,vz -f 5
> Module dstat_vz is still experimental.
> -------cpu0-usage--------------cpu1-usage------ --ve-301-usage----ve-302-usage-
> usr sys idl wai hiq siq:usr sys idl wai hiq siq|usr sys idl nic:usr sys idl nic
>   0   0  99   0   0   0:  0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>  25  15  50  10   0   0:  1   1  76  22   0   1| 26  15  60   0:  0   0 100   0
>  31  18  12  40   0   0:  2   2  70  25   0   1| 33  19  49   0:  0   0 100   0
>  16  14  35  35   0   0:  0   1  53  46   0   0| 16  14  70   0:  0   0 100   0
>   5   5  59  30   0   0: 16  28  30  26   0   0| 20  32  47   0:  0   0 100   0
>   0   0 100   0   0   0:  3   5  88   5   0   0|  2   5  93   0:  0   0 100   0
>   0   0  98   1   0   0:  0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0 100   0   0   0:  0   0  98   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0  96   4   0   0:  0   3  97   0   0   0|  0   0 100   0:  0   0 100   0
>
> [root at itmphys01 dstat]# ./dstat -M cpu,vz -C total -f 5
> Module dstat_vz is still experimental.
> ----total-cpu-usage---- --ve-301-usage----ve-302-usage-
> usr sys idl wai hiq siq|usr sys idl nic:usr sys idl nic
>   0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0  97   2   0   0|  0   0 100   0:  0   0 100   0
>  19  12  61   8   0   0| 37  23  40   0:  0   0 100   0
>  12   8  41  38   0   0| 25  15  61   0:  0   0 100   0
>  14  14  35  37   0   0| 28  26  46   0:  0   0 100   0
>   4  10  84   3   0   0|  7  20  73   0:  0   0 100   0
>   0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0  99   1   0   0|  0   0 100   0:  0   0 100   0
>   0   0 100   0   0   0|  0   0 100   0:  0   0 100   0
>
> All feedback welcomed.
>
> Kind regards,
> --   dag wieers,  dag at wieers.com,  http://dag.wieers.com/   --
> [all I want is a warm bed and a kind word and unlimited power]
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