@Override
  public File getArchiveFileName() {
    return statisticsConfig.getStatisticArchiveFile();
  }
Returns the <code>ProcessStats</code> for this Java VM. Note that <code>null</code> will be
returned if operating statistics are disabled.

@since GemFire 3.5
geode-core/src/main/java/org/apache/geode/internal/statistics/GemFireStatSampler.java