The Listener component automatically gathers information
about the operating environment of an application. The counters that
gathered are the same, with few exceptions, regardless of the operating
system in use.
Environmental information
The environmental information that is collected by the
Listener includes any static data about the application or the computer.
Central processing unit counters
The central processing unit counters include information
about the percentage of time that is spent by the central processing
unit in various states, the number of interrupts and context switches,
and memory information as available. The percentage of the central
processing unit time totals 100% across the following categories.
Although these values are represented in the Dashboard as Event counters,
they are more properly viewed as Meters because they represent absolute
values 0 - 100%.
Disk counters
These counters measure the Disk counter page-in and page-out
operations and disk reads and writes.