Monitors Page

Name

Monitors -- A container for a collection of tracked values

list of monitors for a sub-device

Test: Name of what is being monitored; click to view/edit events for this monitor
Data: Information about the last gather of this monitor
Value: value gathered in the last run
Rate of Change: Difference between the current value and the last value, divided by the time between samples
Time Stamp: Date/Time of last gather for this monitor
Graph: A small representation of the current data gathered for this monitor; click on the graph for more options
Add: add a new monitor to this sub device
Edit: edits options of a monitor
Delete: deletes the monitor and everything underneath it

edit info about a monitor

Monitoring Type: specifies the type of test used for this monitor (Script, SNMP, SQL, or Internal)

Test Options: this section varies depending on the setting of Monitoring Type

Script Test: specifies which script to run
Parameters: specifies a string which will be appended to the script's parameters. Parameter expansions are honored in this field.

SNMP Test: specifies which SNMP test to run
Parameters: specifies a string which will replace the expansion %parameters% in SNMP OIDs.

SQL Test: specifies which SQL test to run
Parameters: specifies a string which will replace the expansion %parameters% in SQL queries.

Data Type: the RRDTOOL data type for this monitor
Absolute: a counter reset when read
Counter: an incrementing value interpreted as a rate (such as calculating your average speed with odometer readings)
Derive: a counter without overflow protection, permits graphing of negative rates
Gauge: the value read is the value used, such as temperatures

For a more complete discussion on when to use which data type, see the RRD Create manual page.