The PostgreSQL plug-in uses these measurement classes.

  • DataBaseMeasurementPlugin.java

  • ResourceMeasurement.java

  • TableMeasurementPlugin.java

  • PostgreSQL.java

  • ServerMeasurement.java - uses SIGAR to obtain operating system statistics such as CPU and memory usage.

Some metrics,such as Index Space Used and Database Space Used are only incremented after a PostgreSQL vacuum or analyze operation is performed.