If you hit the DynPerfMon session at Convergence 2015 make sure to checkout DynamicsPerf Deep Dive – Baselines
DynamicsPerf Deep Dive – Baselines – Dynamics AX in the Field – Site Home – MSDN Blogs
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.