Site collection size limit exceeded.

Hi, 

There are 3 site collections in one content database. Currently one site collection size is 124 GB (approx). But Microsoft strongly recommending ,that the backup and restore is only supported for a maximum site collection size of 100 GB.

But currently web application is working fine. There are no issues with accessing content from DB.

I don't know what kind of action should be taken now. Please can anyone assist on this problem ?

RameshNK