Multiple Device Manager gauges
Multiple Device Manager (MDM) gauges are user-defined,
graphical and tabular presentations of performance data and performance exceptions.
Gauges are saved in the Performance Manager database and retrieved upon
request. When you request data pertaining to a defined gauge from Performance
Manager, Performance Manager builds a query to the database, retrieves and
formats the data, and returns it to you.
You can create (define) gauges, list gauges, modify and delete gauges,
and display information about a specific gauge.
Gauge types
Performance Manager supports the following gauge types:
- Performance
- The performance-type gauges present sample-level performance data. The
frequency at which performance data is sampled on a device depends on the
sampling frequency that you specify when you define the performance collection
task. The maximum and minimum values of the sampling frequency depend on the
device type. The static display presents historical data over time. The refreshable
display presents near real-time data from a device that is currently collecting
performance data.
- Exception
- The exception-type gauges present a count of warning and critical thresholds
exceeded for each of the thresholds that are enabled. An exception occurs
when a measurement from a collection of values sent by a storage device, exceeds
a preset value. For each day in a time span that you select, Performance Manager
reports the total number of warning- and critical-exceptions for the selected
device. The types of exceptions that are reported depend on the device type.
With an expanded view, you can see information about each exception occurrence
such as the time, subcomponent identification, and the actual value of the
metric when the exception occurred.
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