Hi Guys,
we are running 3 nodes and 8 sql server instances on each node, the node a gets crazy on cpu usage(90%~100%) every 10 minutes, there is no scheduled task or reporting running on this timing basis, observing the task manager, the clussvc.exe is up to 20%~23% when cpu is 90~100%, by windows performance analyser, found out rpcrt4.dll cause lot of cpu usag, also the resource monitor shows lots cluster api calls/sec and group api calls/sec; messages sent/sec is high in Cluster Multicast Request Response Messages section; no doubt many bytes coming through and out in Cluster Network Messagess section.
Is there a way to find out what cause the cpu high usage issue?
We are using windows server 2012 R2, ram is big enough.
Regards,
Nicolas