@Override
  public SystemMemoryStatistics getSystemMemoryStatistics() {
    return posixCommandBasedStatisticsGetter.getSystemMemoryStatistics();
  }
An default implementation of {@link SystemStatisticsGetter} that relies on {@link PosixCommandBasedStatisticsGetter}
and {@link OshiBasedStatisticsGetter} implementations
samza-core/src/main/java/org/apache/samza/container/host/DefaultSystemStatisticsGetter.java