Davin Milun 14.03.2006 21:21:
At 12:25, on Mar 14, 2006, markallen@micron.com wrote:
I use DFM and MRTG to monitor several of filers. I've ran into issues with CPU stats for multi-processor systems. [...]
Which MRTG are you using? I've found that querying SNMP for the CPU busy (.1.3.6.1.4.1.789.1.2.1.2) use will indeed graph the AVG CPU, which is the sane one.
Actually, .1.3.6.1.4.1.789.1.2.1.2 is cpuBusyTime (at least the MIB for DOT 6.5.x says so) and calculating CPU utilization via delta(cpuBusyTime)*100/delta(cpuUpTime) on a FAS960 leaves us with a no-so-satisfying ANY value. See also Bug-IDs 141441 and 148982.
It would be better to have snmpd report a cpuTable with seperate data for all CPUs.
I've never understood why most NetApp tools (all the way down to regular sysstat (except for -m)) report the ANY value.
Marketing? "Look at that, 100% busy again! We need new filer heads" ...
-Cornelius