[mrtg] Multiple/single hyperthreaded CPUs have inconsistent polled value ranges

Spencer B. Torene sbtorene at pbs.org
Tue Dec 27 18:30:44 MET 2005

Hi, and happy holidays to all.


I am graphing the network usage on the CPU usage of about 15 different
servers.  Most have two hyperthreaded CPUs (creating 4 visible CPUs in
the "top" command), but some have only one hyperthreaded CPU (showing 2
CPUs).  There seems to be no consistency in how I poll these two types
of servers.


For the servers with two hyperthreaded CPUs, I divide the polled values
(in the config file, below) by 2, which creates an accurate looking CPU
graph (as far as I can tell).  For the servers with one hyperthreaded
CPU, I don't divide the polled values, but the values shoot off to over
100%, anyway, which creates flatlined graphs at about 87% usage.  Is
there a reason why I should be dividing both types of servers by 2?
What am I missing?



Thanks a lot!







LoadMIBs: /etc/mrtg/MIBs/UCD-SNMP-MIB_10.168.46.56.txt


ssCpuRawUser.0&ssCpuRawUser.0:community at +
ssCpuRawSystem.0&ssCpuRawSystem.0:community at +
ssCpuRawNice.0&ssCpuRawNice.0:community at

MaxBytes[]: 100

Title[]: CPU Usage for -- ildb03

PageTop[]: <H1>CPU Usage for --

ShortLegend[]: %

YLegend[]: % CPU Utilization

Legend1[]: Current CPU percentage load

LegendI[]: Active


Unscaled[]: ymwd

Options[]: growright


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