MySQL to add to cart 1-4 Socket Server
Socket here means physical CPU plugged into the motherboard.

Note that a single socket will consist at least one "core".

From the MySQL products page:


  5 Socket: is defined as a slot that houses a chip (or a multi-chip module), which contains a collection of one or more cores. Regardless of the number of cores, each chip (or multi-chip module) counts as a single socket. All occupied sockets on which the Oracle programs is installed and/or running must be licensed.


** I use "plug" loosely nowadays of course