@Override
  public int estimateSize() {
    return 8 + 4 + 1 + 1 + 8;
  }
The memory occupied by an DeviceInfo based occupation

<ol>
  <li>object header, 8B
  <li>int schemaTemplateId, 4B
  <li>boolean useTemplate, 1B
  <li>boolean isAligned, 1B
  <li>aliasChildren reference, 8B
</ol>
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/mnode/info/TreeDeviceInfo.java