Egy nagyon szórakoztató Hyper-V performance guide :)

Use Hyperthreading. I’ve seen a tiny handful of claims that Hyperthreading causes problems on Hyper-V. I’ve heard more convincing stories about space aliens.
I’ve personally seen the same number of space aliens as I’ve seen Hyperthreading problems with Hyper-V (that would be zero).
If you’ve legitimately encountered a problem that was fixed by disabling Hyperthreading AND you can prove that it wasn’t a bad CPU, that’s great!
Please let me know. But remember, you’re still in a minority of a minority of a minority. The rest of us will run Hyperthreading.
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Don’t let fragmentation keep you up at night. Fragmentation is a problem for single-spindle desktops/laptops, “admins” that never should have been promoted above first-line help desk, and salespeople selling defragmentation software.
If you’re here to disagree, you better have a URL to performance traces that I can independently verify before you even bother entering a comment.
I have plenty of Hyper-V systems of my own on storage ranging from 3-spindle up to >100 spindle, and the first time I even feel compelled to run a defrag (much less get anything out of it) I’ll be happy to issue a mea culpa.
For those keeping track, we’re at 6 years and counting.
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Don’t worry so much about NUMA. I’ve read volumes and volumes on it. Even spent a lot of time configuring it on a high-load system. Wrote some about it. Never got any of that time back.
I’ve had some interesting conversations with people that really did need to tune NUMA. They constitute… oh, I’d say about .1% of all the conversations that I’ve ever had about Hyper-V.
The rest of you should leave NUMA enabled at defaults and walk away.
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Learn to live with the fact that a) your four-spindle disk array can’t fill up even one 10GbE pipe, much less the pair that you assigned to iSCSI and that b) it’s not Hyper-V’s fault.
I know this doesn’t apply to everyone, but wow, do I see lots of complaints about how Hyper-V can’t magically pull or push bits across a network faster than a disk subsystem can read and/or write them.
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Don’t blame Hyper-V for your networking ills. I mention this in the context of performance because your time has value.
I’m constantly called upon to troubleshoot Hyper-V “networking problems” because someone is sharing MACs or IPs or trying to get traffic from the dark side of the moon over a Cat-3 cable with three broken strands.
Hyper-V is also almost always blamed by people that just don’t have a functional understanding of TCP/IP. More wasted time that I’ll never get back.”