When I generate XML VDB from VDB, the designer adds "<metadata type="NATIVE"/>" property to XML VDB. It causes performance issue because deploy XML VDB takes a long time.
The time between deploy VDB (added to the repository) and set VDB to active:
With "metadata native" property: 3 minutes.
Without "metadata native" property: <1 seconds.
For this example, I use XML VDB (in the project from attachments) which connects to MS SQL Server database.
When I use another connection with a lot of tables and schemas, it takes very long (more than 30minutes).
I think that it is not necessary to add this property by default to all XML VDBs only if it is necessary for specific VDB. For users who want to use this property will be good to add a new checkbox to the 'options' tab in the 'Save as VDB XML file' wizard. (screenshot)