@After
  public void tearDown() throws Exception {
    if (sampleCollector != null) {
      sampleCollector.close();
      sampleCollector = null;
    }
    manager = null;
  }
Unit tests for the StatisticsMonitor class. No disk IO.

@since GemFire 7.0
geode-core/src/test/java/org/apache/geode/internal/statistics/StatisticsMonitorTest.java