Understanding CloudLinux Statistics
I have moved host providers, and my new provider uses CloudLinux.
CloudLinux uses a container technology called Lightweight Virtual Environment, or LVE. This container technology allows many users to co-locate on the same server. Each tenant is limited to specific resources and cannot exceed them and thus, negatively influence the other tenants.
Physical Memory Usage (RAM) is a combination of physical memory and disk cache. When physical memory usage is close to max CloudLinux will dump its disk cache to free up space. If physical memory usage is still maxing, users will experience PHP error 500 and 503s.