The SG-TDE-MySQL is a complete stack that comes bundled with “Just Enough Operating System” plus the encryption software to encrypt MySQL data files along with a free key store and a log management service. The size of the entire bundle is around 750MB compared to 6-8GB of that of a Commercial-Off-The-Shelf (COTS) Linux distribution generally used to run a MySQL server.
A smaller size means that there is less attack surface available to an attacker to exploit vulnerabilities. It also means that there are fewer patches to be applied which lowers the Total Cost of Ownership (TCO).