The requiredfile table is too large.
11,500 lines and 2.7mb
The database is 40mb.
Can I truncate this “table”?
That table will be as large as it needs to be. No you can’t truncate it. If you do, the whole CMS will stop working.
If you want it to be smaller, ensure you’re on 1.8.9, and reduce the number of twitter/rss feeds you use with images in them.