@Override
  public long getTotalSeriesNumber() {
    return totalMeasurementNumber.get() + totalViewNumber.get() + getTemplateSeriesNumber();
  }
This class is used to record the global statistics of SchemaEngine in Memory mode.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/rescon/MemSchemaEngineStatistics.java