Active Processes 

Number of processes that are active on the system 

Physical Memory Used 

Amount of system memory that is in use  

Physical Memory Free 

Amount of system memory that is available 

Swap Used 

Amount of system swap space that is in use 

Swap Free 

Amount of free system swap space 

Page Rate 

Rate of system paging activity 

System Calls 

Number of system calls per second 

Network Packets 

Number of network packets that are transmitted per second 

CPU Usage 

Percentage of CPU that is currently in use 

Load Average 

Number of processes in the system run queue which are averaged over the last 1, 5, and 15 minutes