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Creating an alert rule
Perform the following steps:
- Navigate to the Azure portal at http://portal.azure.com and sign in.
- In the Azure portal, type Log Analytics in the search field and select your workspace.
- In the Log Analytics blade for your workspace, click the Log Search button to take you to the search field:
Figure 3.1
- In the Log Search editor, conduct a search by typing in this table-based query and clicking the search icon:
Perf
| where ( ObjectName == "Memory”)
| where (CounterName == "Available MBytes”) and CounterValue<=1024
|summarize avg (CounterValue) by Computer
Figure 3.2
- After the results have been displayed in the results field, click the alert button at the top of the Log Search page to open the alert rule page:
Figure 3.3
- In the Add Alert Rule page, enter a rule name in the Name field, such as Available Mbytes of Memory <= 1024, and optionally, fill in the Description field.
- Click the drop-down under the Severity to select an alert severity, review the query in the Search query field, and enter a time range in the Time window field.
- In the Schedule section of the alert rule page, enter a time frequency in the Alert frequency field to indicate how often the query should be run.
You can specify a time range and alert frequency of between 5 minutes and 24 hours in both the Time window and Alert frequency fields.
- Next, select the Number of results field and Greater than 0 in the Number of results field. Then click on Save.