Have you reviewed the recommendations in the help - General Performance Guidelines
There are also some lessons learned for performance from AWS EC2 instances here: Tableau Server Performance on AWS EC2 | Tableau Love
and then this whitepaper from Tableau - Tableau Server Scalability - A Technical Deployment Guide for Server Administrators | Tableau Software
I hope this helps,
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Thanks for those resources, I have looked at those already and are guiding my POC plans, I was more wondering if there was anything specific to GCC (similar to the Server on AWS EC2 article you linked) maybe Russell Christopher might have something in the works? (I haven't found anything on Tableau Love anyway)