MySQL version selection

Enterprises in the selection of database products, because of the needs of the database products, high-level enterprise universal suffrage Oracle, the Internet and other emerging industries in my just graduated that will mature solution is MySQL, and recently this 2 years with the data, non-relational database advantages stand out!

How does the DBA make the decision when choosing MySQL?

2012 just took over a project, chose mysql5.5 distance This product release also has more than 2 years, the main bug is found to have been found, at that time did a simple stress test, hardware system burning machine on the line, after the business is not very high, has been very stable running, and now running ... After the continuous deployment of the version of multiple updated versions, the system reliable operation;

The new problem comes, Oracle after the update of their own after the first version 5.6, it should be stable today, call for updated voice often from the program side reflected, I slowly think we want to update?

First, is the current database and architecture theoretically and realistically able to meet business needs?

Second, is the current DBA ability reached the ability to operate 5.6 proficiency, or upgrade and then slowly learn?

Thirdly, what is the current technical support price? This is the latest price:

MySQL version selection