Yesterday I upgraded to Moodle 2.2. Everything was fine with regard to the database and all the settings. I only have to modify two lines of the lib.php of book as it didn’t display the print menus (this is a documented bug).
However, I have just noticed the automatic backup of the database generated by mysqldump is half size of the file size before the upgrade:
With Moodle 2.0, our database.sql file was 150.000 Kbs.
After the upgrade to Moodle 2.2 , the size is 50.000 Kbs.
Is this normal? Everything is working fine so far.