SQL Minor Changes

I need two small changes made to our mysql database. 1. It needs to autovacuum itself. The server permits this, but it is not presently enabled for our database. 2. It makes a backup of itself multiple times per day and saves them as a new file each day. I need this changed to backup only once per day, and to name itself by the day of the month so that these files don't accumulate (we built up 280 MB of them in a year).