Default [Q] Converting SQL DB from db-journal to db-wal

Has anyone tried to convert the apps databases (SQL) from Rollback-journal, which is what my device uses (Xperia J) to WAL?

I can convert the databases, it works OK, but when I reboot I believe it goes back to Rollback-journal.

Anyone has an answer for this? Is this the normal behaviour? How can I prevent ir from reverting back to rollback journal upon reboot?