Some months ago we expand our 4 node Metrocluster with AFF700 to an 8 node Metrocluster. The Ontap version was 9.7P7 and since May 30th we have 9.7P13 running.
The Grafana is installed with this versions:
netapp-harvest-1.6-1.noarch
graphite2-1.3.10-1.el7_3.x86_64
grafana-5.2.4-1.x86_64
After this expansion one of the new nodes have very high (~20000%) CPU utilization for about 3-4 minutes. This peaks appear irregular. There are no other peaks from volumes or network during the same time, what could be the reason for this CPU peaks.
We opened a case and Netapp checked the Metrocluster, but everything is fine. They don't see in the perfomance data they have any CPU peaks or problems.
So we and Netapp think, the Grafana is not working fine or uses wrong performance data.
Here is a chart:
Does anyone here have similar problems or an idea what the reason could be.
We would be happy for any suggestions.