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List:       net-snmp-coders
Subject:    Re: Problems with ssCpu results; Graphing CPU Usage
From:       Matthew Boehm <mboehm () cytelcom ! com>
Date:       2005-08-26 19:19:18
Message-ID: 430F6B36.8000900 () cytelcom ! com
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Dave Shield wrote:

 > Ummm....
 > What exactly is wrong with these figures?


     Check out the sample graph from the NET-SNMP tutorial:
http://net-snmp.sourceforge.net/tutorial/tutorial-4/mrtg/kontor.cpu.html

     Compare that with 'My' user vs. idle:

http://cytrex.cytelcom.com/cgi-bin/14all.cgi?log=asterisk_user_idle

     My idle shows NaN. But if I query it directly:

[root@cytrex2 asterisk]# snmpwalk -v 2c -c public local ssCpuRawIdle.0
UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 226102585

 > It's only
 > when there are two successive readings that MRTG can plot the
 > difference between them.


     MRTG is probably graphing correctly. My concern is that if you look 
at this graph of mine:

http://cytrex.cytelcom.com/cgi-bin/14all.cgi?log=asterisk_user_system

     Which is User vs. System, you can see that the system usage never 
drops below 10%. I watched this system last night using "top" and never 
once did my idle time get below 98% for the 15 min I watched it. Even my 
load avgs where all 0.

-Matthew



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