Load is a measurement of how hard the server is working. It is normal for load to increase through the night due to generating backups for all the accounts on the server.

The system CPU utilization. We are notified if CPU utilization reaches a certain threshold.

This sensor monitors and graphs the system proceses that are running. We are notified if this reaches a certain threshold.

TCP Connections displays the number of passive, active and failed connections from since the last polling interval.

These charts are scaled to the amount of memory available and graphed according to the memory used. On Linux Servers (like ours), it is not uncommon to have nearly all of the physical memory in use at any given time. You should check the Swap usage to determine if your server is low on resources.

The Swap Memory is virtual memory that is used by the system for paging and caching. If the server is under heavy load or running low on resources, you may see swap memory in use. If the usage goes above 20 - 50%, we will consider rebooting the server.