How to get an import of a very large Drupal database working?
I'm not sure how much overhead drush puts on top of large SQL imports, I've only used it for smaller imports and queries. You can try the mysql client as an alternative that would remove the drush overhead.

If you can install pipe viewer on your VM you can view the progress of the command consuming the import.

pv mydb.sql | drush sql-cli


Or without the drush overhead

pv mydb.sql | mysql -u &lt;DB_USER&gt; -p&lt;DB_PASS&gt; &lt;YOUR_DB&gt;