@Override
  public int estimateSize() {
    return 8 + 8 + 8 + 1 + 32 + (alias == null ? 0 : ALIAS_BASE_SIZE + alias.length());
  }
The memory occupied by an MeasurementInfo based occupation

<ol>
  <li>object header, 8B
  <li>alias reference, 8B
  <li>long tagOffset, 8B
  <li>boolean preDeleted, 1B
  <li>estimated schema size, 32B
</ol>
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/mem/mnode/info/MeasurementInfo.java