A common use case is to monitor memory usage, and trigger a warning
if your system is approaching its upper limit.To create a memory usage trigger:
- In Cloudera Manager, go to the Hosts page.
- Click a link in the Name column to open a host
status page.
- In the Health Tests section, click
Create Trigger.
- On the New Trigger page, enter the name
Resident Memory In Use.
- In Expression, set these metric
conditions:
- Scalar Function:
Min.
- Metric:
mem_rss.
- Comparator: >
(greater than).
- Scalar Value:
1.75GB. (This is a low value for
demonstration purposes, so that it will trigger the action. In
practice, use a value that more accurately reflects the memory
limits of your cluster.)
- Set Action to Mark as
bad.
As you work, the
Preview shows the resulting chart
and current status of your host.
- Scroll down and choose whether to apply this trigger to All
hosts.
- Click Create Trigger.