We are upgrading hardware for a MySQL database server (DB is around 200GB). We're getting 4x Samsung 850 Pro SSDs and are planning to run them in a RAID10 configuration. Also, 128GB of RAM.
The quote from our supplier includes dual 6 core Xeons (E5-2620V2 2.1G) with an option to upgrade to E5-2630V2 2.6G instead.
The price for the faster CPUs would be about $622 extra (about $311 each), which is around 6.5% of the price of the server.
Since we don't have the hardware, of course, I can't benchmark it and see whether the faster CPUs would make a difference for our database and the way we query it. But is there some way to get an idea of whether the faster CPUs will help? i.e. assuming the current bottleneck is I/O and we replace the disks with SSDs, is it possible/likely for the E5-2620V2 CPUs to become the bottleneck?