Thread:Extension talk:ParserFunctions/Database size skyrockets after enabling?

I have a small Mediawiki installation of about 60 pages, operating for about 2 years. The database size was about 10-12 MB. I enabled parserfunctions and the string functions in order to get cite web working. The next database backup that I did was now 125 MB! Other than making a few edits and putting in a citeweb template, there was not much else going on between backups. Is this normal?