The CPU and the Memory Monitoring MIB -CodeIdol

The UCD-SNMP-MIB MIB keeps track of a number of key performance MIB objects, including the commonly used ones in Figure.

Figure Important Objects in the `UCD-SNMP-MIB` MIB
`UCD-SNMP-MIB` Object Variable	MIB Type	MRTG Type	Description
`ssCpuRawUser`	Counter	Counter	Total CPU usage by applications run by nonprivileged users since the system booted. Adding the user, system, and nice values can give a good approximation of total CPU usage.
`ssCpuRawSystem`	Counter	Counter	Total CPU usage by applications run by privileged system processes since the system booted.
`ssCpuRawNice`	Counter	Counter	Total CPU usage by applications running at a nondefault priority level.
`ssCpuRawIdle`	Counter	Counter	The percentage of the time the CPU is running idle. Subtracting this value from 100 can give a good approximation of total CPU usage.
`memAvailReal`	Integer	Gauge	Available physical memory space on the host.

The CPU and the Memory Monitoring MIB