MYSQL size jump after mods- normal?

EDIT-  removed

I would normally say no, but I wasn't sure about this so I checked the SQL tables for MyDatery.Com and came back with the following information.

Depending upon the size of the item that was added to your site, the answer is yes this could happen.  For example, I run an e-mail filtering system that not only tracks a members profile settings but it also pays attention to their habits (sorry guys, this one is patented and gives me an edge I can't let go of on the industry) to allow members to block others before they ever come in contact with them based solely upon the other members habits.  Now this item is monstrous in the database and keeps growing as the site grows.  This one item has a size of 686 KB, which is monstrous in comparison to the rest of the tables.  Even the country and zip code listings combined don't come anywhere near the size of this one table.

So, the only way to know is to look at what was installed, and then ask from there.  If you need someone to look at the source code I'm sure someone here is happy to help you with this.

Thanks.

That's what it seems to be, in this case, a large IP database was added.

Yeah, a large IP database will create a major increase.