Metrics in Apache Cassandra 1.2

Apache Cassandra uses the Yammer Metrics library for tracking client request metrics since version 1.1. The library offers tools like Counters, Gauges, and Timers with an easy-to-use API. Metrics can be exported to files or other systems periodically using official "metrics reporters" or community-developed ones. In this article, the author demonstrates how to configure Cassandra to report metrics to Graphite using a java agent. New metrics provide more information than previous versions and are easily integrated with other systems.