Wrong CPU load information

[SpecialK]

In our CPU load graphs, Zabbix is printing completely wrong information. For one of our servers, the load is a constant 3 aside from occasional peaks to 5. But the graph for this server always shows a CPU load of .5 with occasional peaks to .7.

This is happening on all of our systems (All of which are multi CPU, if that makes any difference)

Am I just misinterpreting the graph or is something weird going on?

[jix]

j

same problem here

my server load with top command says 1.59
but zabbix graph shows under 0.1

[SpecialK]

I think I may have figured this out, though it makes no sense to me.

We have 8 CPUs in a particular system. If the load is 2.54 via top, that is 31.75% utilization. The Zabbix graph shows .3175 during this period. I think that is the correlation, but I don't care for it at all.

Is there any way to change this graph to show the actual load via top? Or at the very least to show 31.75% instead of .3175?

[tchjts1]

Revising...

Mine appears to be fairly accurate.
From TOP:
top - 11:23:53 up 149 days, 1 min, 1 user, load average: 0.61, 0.69, 0.63

[SpecialK]

load average: 2.48, 2.42, 2.33

Cpu(s): 28.1%us, 2.2%sy, 0.0%ni, 68.9%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st

And the graph that we're using in Zabbix was set up automatically by Zabbix from the autodiscovery and is called "CPU Load".

I would expect the "load average" and the "CPU Load" graph to match up.

[tchjts1]

I attribute the differences between TOP showing actual values, whereas Zabbix is doing averages per core. I figure they are close enough.

Anyway, if you look at the item on one of your hosts, you will see in the description how it is calculating.

"The processor load is calculated as system CPU load divided by number of CPU cores."

[SpecialK]

Ah - I hadn't seen that before. So my conclusion was correct. So on that graph, a 'load' of 1 basically indicates 100% CPU utilization (Top load of 8 / 8 cores = 1)

It seems odd, but I guess we can deal with it.