755 (MySQL) vs 773 (Sqlite)

Dear users,
Since I have migrated to SQLite, I notice the following :

1) During a DB scanning, I can't access the folder (it's a SQLite restriction).
2) If I browse a folder where I put a new mp3 file, the SCAN will start followed by a SCAN of the TRACKSTAT plugin : it will block my server for a while.
3) In the morning, the WakeUp can be blocked due to this TRACKSTAT Scan (It can take 3 hours).
4) The CPU load during the SCAN is > 99 %.

Is it a possibility to use the 773 with MySQL (already running for other applications on my NAS).
In the future version will it be possible to choose the SQL version?

Thanks for your advices.