Cassandra Monitoring

Last updated on 28 July, 2022

LogicMonitor monitors Cassandra clusters using JMX. The following Datasources are available:

  • Cassandra JVM Garbage Collection –
  • Cassandra JVM Heap and Threads and Uptime –
  • Cassandra JVM Memory Pools –
  • Cassandra Keyspace Cache –
  • CassandraColumnFamilyStore –
  • CassandraCommitLog
  • CassandraCompactionManager
  • CassandraConcurrent –

To use these in LogicMonitor, check your file on the Cassandra server to see what you have configured for RMI authentication, including user, password and JMX port. Then add your Cassandra server as a monitored device.

Once added, locate this server on the Device tree and configure its properties as follows:

  • Set the system.categories property to cassandra
  • Set the following three properties to reflect what you have configured in the file:
    1. cassandra.jmx.port =
    2. jmx.user =
    3. jmx.pass =
  • Note: Two of the datasources (CassandraColumnFamilyStore and CassandraConcurrent) use jmx.port for #1 above. If you use these, either edit the ‘URL’ field in those datasources to specify ‘cassandra.jmx.port’ to make them consistent, or set the jmx.port property instead.

Cassandra Troubleshooting

The nodetool utility is a command-line interface to access the data exposed by Cassandra via JMX. You can use this to verify that you can access performance data as follows:

nodetool -h host -p port -u user -pw password command

Available commands:
  info                   - Print node informations (uptime, load, ...)
  cfstats                - Print statistics on column families
  cfhistograms           - Print statistic histograms for a given column family
  compactionstats        - Print statistics on compactions
  netstats [host]        - Print network information on provided host
  tpstats                - Print usage statistics of thread pools

See Apache Nodetool documentation for more details.

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