Hi Mike, SIOC is very useful in making sure the 'noisy neighbor' does not hog up storage resources for other VMs. As for the recommended threshold, use Duncan's recommendation as a baseline reference point. My recommendation is to tie it to what your applications/end users demand (service level objective/agreement with application team). 20 ms is a reasonable number to set for Nimble given our flash optimization to accelerate performance. But if your applications can tolerate higher average latency, then It'd not make much sense to start throttling back workload to get lower latency. Hope this helps.