@Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    return super.equals(o);
  }
The histogram config which is used to create IoTDBTimer and IoTDBHistogram
iotdb-core/metrics/core/src/main/java/org/apache/iotdb/metrics/core/IoTDBMetricManager.java