You can access Settings using the gear icon on the top-right side of the page. Settings is where you can view license information and a list of installed extensions. This is also where you can set up an email server to use for notifications.
If you are running the DryvIQ Platform in a DryvIQ Cloud environment, you do not need to adjust any Performance settings as DryvIQ manages performance for you. If you are running the DryvIQ Platform in your own cloud environment, you should consult with your DryvIQ Professional Services Representative or DryvIQ Customer Support before making changes to any of performance settings.