High CPU load

The preferred method to gain insight into high CPU usage is to use top or htop while it's in a high CPU usage state. This will help you get a clear picture of the likely culprit. I have included some helpful links regarding how to use top and htop. See below:

• Using top to Monitor Server Performance | Linode Docs
• Linode Community -- Why is my Linode suddenly using 100% of its CPU?
• Linode Community -- Investigate the cause of high CPU usage?

Depending on your Linode plan, the allowed CPU usage may vary. For example a Shared 32GB plan has 8 cores, which allows you to use up to 560%(80% per core for a Shared plan) sustained usage over a 24-hour period without any adverse consequences. That said, if you're receiving Notification Threshold alert emails regarding your CPU usage that's lower than CPU percentage of your plan, you can customize those alerts:

• Your Linode has exceeded the notification threshold (21137) | Linode Questions

Also if you find that your workload consumes more resources than you expected, consider upgrading to a larger plan:

• Choosing a Plan
• Plan Pricing
• Guides | How to Change Plans