We have seven similarly configured and loaded ec2 instances running centos7. Over time, three of these instances have started reporting cpu utilization around 0.1% in vmstat or top, while CW metrics shows 40-50%. In the beginning, and for the remaining four instances, vmstat/top roughly agree with CW metrics. While looking into this, I realized the three that are reporting bad info have newer microcode versions. I could see that the newer microcode version could potentially be a sign of some other changes (newer underlying hardware, etc), so not saying it is due to microcode.
This is throwing off our monitoring software. How can this be fixed?
from /proc/cpuinfo on instance showing wrong cpu usage: microcode : 0x5003501
from /proc/cpuinfo on instance showing expected cpu usage: microcode : 0x42e
