@Override
  public int insertTablet(InsertTabletNode insertTabletNode, int start, int end)
      throws WriteProcessException {
    try {
      writeTabletNode(insertTabletNode, start, end);
      memSize += MemUtils.getTabletSize(insertTabletNode, start, end);
      int pointsInserted =
          (insertTabletNode.getDataTypes().length - insertTabletNode.getFailedMeasurementNumber())
              * (end - start);
      totalPointsNum += pointsInserted;
      return pointsInserted;
    } catch (RuntimeException e) {
      throw new WriteProcessException(e);
    }
  }
Create this MemChunk if it's not exist.

@param deviceId device id
@param schemaList measurement schemaList
@return this MemChunkGroup
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/AbstractMemTable.java