On 01/19/2017 06:29 AM, Subscriber wrote: >> and what kind of IO patterns do those VMs >> have? > Do not quite understand. What do you mean? > What at the VMs doing? Are they entirely idle? Are they doing light work, mostly reading from disks? If they're not generating disk IO, then that's not related. However, during a recent set of benchmarks, I found that disk reads were slower under 7.3 than under 7.2. That might be specific to the system I tested, or it might be related to the change you're seeing.