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Viewing metrics

The MBeans tab contains all the packages exposed by Cassandra, along with some Java-related packages exposed by default for any Java process. You can navigate to any of the nested methods to get a value of an attribute. In the following screenshot, the DownEndpoint metric can be viewed through org.apache.Cassandra.net | FailureDetector | Attributes | DownEndpointCount, which gives a count of the number of nodes that are down. Which is your favorite metric in Cassandra?

Figure 7.3: Viewing DownEndpointCount metrics on JConsole

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