CUCM High CPU Spikes and Utilization
In my two previous INE rack lab sessions (8-25 and 9-8), I was assigned Vorack2. Both times I experienced heavy latency with accessing all of the UC servers. all of the UC servers were extremely slow and intermittently were unresponsive.
During my last lab session, this past Sunday, I noticed that the network became super slow and unresponsive while I was specifically trying to access Enterprise Parameters and Service Parameters. Normal MAC's CUCM were fine.
Troubleshooting the problem through RTMT, I noticed that when I was accessing Enterprise and Service Parameters pages, both the Pub and Sub spiked to 99% CPU utilization for an average duration of 6 to 10minutes. During that time, I would also lose connectivity to the Unity and CUPS servers. When the CUCM Parameter pages finally loaded, CPU utilizations returned to 48%. Once CPU utilization on the CUCM's returned to below 50% mark, Unity and the Presence servers were responsive again.
During the 99% CPU spikes, looking at both RTMT and "show proc load cpu", I noticed that only two CPU processors were active, RISDB and one other process. Neither one took up more than 6% of CPU time, so there is no clear explanation as to why the CPU's were showing 99% utilization.
Regardless, I turned off ALL servers except WebAXL and restarted both the Pub and Sub. This did not resolve the issue. After the reboots, I stop and started (not restart) all network and feature services individually, including RISDB and then rebooted the Pub/Sub servers again. This still did not resolve the issues. I performed "utils snmp hardw restart", this did not resolve the issue. I took a long shot and performed a "utils dbreplication stop" and "utils dbreplication reset all" on the pub, needless to say this did not resolve the issue.
While I did open emergency tickets [#JYO-512382] and [#RLH-683594] and received my token refund both times, working with Christopher Drain from tech support, I think this issue remains open with VORACK2.
My question for the experts; am I'm missing some steps?