We're monitoring CentOS server's CPU usage by SNMP, and fomula is as below;<br />
CPUUsage = 100(%) - ssCpuIdle<br />
<br />
From yesterday, we found that CPU usage is always 100%, that means ssCpuIdle = 0(%).<br />
But, we login to this server, and find that CPU usage is about 0 - 2%.<br />
# vmstat 5<br />
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------<br />
r b swpd free buff cache si so bi bo in cs us sy id wa st<br />
0 0 152000 182620 326936 2081652 0 0 0 3 0 0 2 0 98 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 6 1038 58 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 25 1052 101 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 13 1039 64 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 0 1042 70 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 0 1035 57 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 10 1046 82 0 0 100 0 0<br />
0 0 152000 182620 326936 2081652 0 0 0 2 1038 56 0 0 100 0 0<br />
0 0 152000 182496 326936 2081652 0 0 0 31 1058 106 0 0 100 0 0<br />
0 0 152000 182496 326936 2081652 0 0 0 10 1043 68 0 0 100 0 0<br />
0 0 152000 182496 326936 2081652 0 0 0 5 1042 76 0 0 100 0 0<br />
0 0 152000 182620 326936 2081656 0 0 0 13 1039 63 0 0 100 0 0<br />
0 0 152000 182620 326936 2081656 0 0 0 2 1042 70 0 0 100 0 0<br />
0 0 152000 182620 326936 2081656 0 0 0 10 1044 72 0 0 100 0 0<br />
0 0 152000 182620 326936 2081656 0 0 0 2 1041 72 0 0 100 0 0<br />
0 0 152000 182620 326936 2081656 0 0 0 0 1037 55 0 0 100 0 0<br />
<br />
# <br />
<br />
We're wondering that this is a some kind of bugs of CentOS(or net-snmp). Our net-snmp's version is as below;<br />
# yum list | grep net-snmp | grep installed<br />
net-snmp.i386 1:5.3.2.2-9.el5_5.1 installed <br />
net-snmp-libs.i386 1:5.3.2.2-9.el5_5.1 installed <br />
net-snmp-utils.i386 1:5.3.2.2-9.el5_5.1 installed <br />
# <br />
<br />
If you have any ideas, please tell me how to solve this.
↧
