[Neo] deleting bd has grown

[Miguel Ángel Águila Lorente]

Helo,
I'm doing a delete operation, in this case I'm deleting 310.000 nodes
from 325.000 nodes. I can delete and after that all works well because
the nodes when I get them only appears the no deleted nodes, but the
size of the folder that contains neo4j database has grown. Specifically
has grown the following files:

    - Folder lucene.
    - neostore.nodestore.db.id
    - neostore.propertystore.db.id
    - neostore.propertystore.db.strings.id
    - neostore.relationshipstore.db.id 

I expect, you can help me.
Thank you.

Mike