In the Console go to
Manage>Policies
Go to
Monitoring and Alerting>Monitor>Monitor Policies and right-click on the
Monitor folder (or whatever folder is desired) to create a new monitor policy under
Select
New>Monitor Policy (Agent-based)
In the new monitor policy click on the name and change it to "Less than 20% RAM Free - Send Email" (or whatever name is desired)
click the blue
+ button under the
Rules tab
In the
Select Rule window click
* New and select
Metric
In the
New Metric Rule window name the new metric rule "Less than 20% RAM Free" (or whatever name is desired)
Click
Select category and select
Memory
Under
Metrics click the yellow
* button to add a metric evaluation
In the
New Metric Evaluation window click
Select Metric
In the
Select Metric window select
Memory Available % of Physical RAM and click
OK
Back in the
New Metric Evaluation window set
Statistics: to
Average (or
Minimum or
Maximum)
Set
Time period: to "30"
seconds or whatever is desired
Set
Condition to
Is less than or equal to (or
Is less than)
In
Value: enter "20" (or whatever percentage is desired)
Click
OK
Figure 1. Screen shot of how the Metric Evaluation and Metric Rule should be configured.
Back in the
New Metric Rule window under
Actions, set
Set severity to: to "Warning" (or whatever is desired)
Under
Tasks in the
Task server: box click the blue
+ button
In the
Select Task window browse to
System Jobs and Tasks>Monitoring and Alerting>Monitor>Tasks>Send Email and then click
OK
In the
Task Configuration window click
OK
Back in the
New Metric Rule window click
OK
Back in the
Select Rule window click
OK
Back in the monitor policy under
Applies To click
Apply to and target the desired computers or filter
Finally, click
Save Changes