High CPU utilization

[Saurabh Shah]

Hello,

I have taken Google cloud service on trial basis but every now and then my cpu utilisation shoots upto 100% eventhough I upgraded CPU cores and RAM the problem doesnot seems to be solved. At the time of issue the ssh is not accessible so I am not able to figure out what the issue is.Here is the screenshot of the CPU utilisation. At the time of high cpu utilisation the outbound traffic increases also I have reinstalled OS many times but my issue doesn't seems to be resoved.

[Justin Reiners]

A misconfiguration of internal software can cause that it a service keeps looping to start. Does it show anything in the console?

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[Saurabh Shah]

At the time of 100% CPU usage I am not able to do ssh and also not able to use console.

[Kamran (Google Cloud Support)]

Hello Saurabh,

To get some ideas on what's happening to your VM, you can use the Google Cloud Console, go to Compute Engine -> VM instances, click on name of the affected VM and take a look to the output of Serial port 1 (console). If you can find some activities or errors that correlate to spikes of your VM's CPU that would be good point to start investigating the issue. Interacting with the Serial Console is another method that can help you to get into the VM while SSH is not working to inspect and troubleshoot malfunctioning instances. If you've customized your VM by installing some softwares or services make sure that the VPC firewall rules locked down to only allow ingress from and egress to authorized hosts.

I hope this helps.