E-MapReduce:View service monitoring metrics

Prerequisites

Before you begin, make sure you have:

• An EMR cluster. See Create a cluster

View metrics in the EMR console

1. Log on to the EMR console. In the left-side navigation pane, click EMR on ECS.

2. In the top navigation bar, select the region where your cluster resides and select a resource group.

3. On the EMR on ECS page, find the desired cluster and click the cluster name in the Cluster ID/Name column.

4. Click the Monitoring and Diagnostics tab, then click the Metric Monitoring subtab.

5. Select an item from the Dashboard drop-down list. From here, you can:

   • View the definition of a metric: Hover over the icon next to a metric name.

   • View metrics by node: For some services, you can view their metrics by node.

   • View metrics by time window: In the Select Time section, choose a time window to scope the charts.

   • Isolate specific metrics: If a chart contains multiple metrics, click the metric names at the bottom of the chart to view the metrics.

   

View metrics in the CloudMonitor console

In the upper-right corner of the Metric Monitoring subtab, click View More Metrics to open the CloudMonitor console. There you can search for and explore the full set of EMR metrics synchronized to CloudMonitor.

To set threshold-based alerts on these metrics, see Create a threshold-triggered alert rule.

To build a custom view beyond the default charts, see Manage the monitoring charts of a custom dashboard.

Subscribe to metric alerts

In the upper-right corner of the Metric Monitoring subtab, click Subscribe to Metric Alerts to go to the Alert Rules page in CloudMonitor. From there, configure alert rules based on any metric synchronized from EMR.

For example, create an alert rule to notify you when Hadoop Distributed File System (HDFS) storage usage exceeds 80%. For detailed steps, see Create a threshold-triggered alert rule.