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by toast0 580 days ago
When you have a thousand machines, you can usually get feedback pretty quick, in my experience.

Run the tune on one machine. Looks good? Put it on ten. Looks good? Put it on one hundred. Looks good? Put it on everyone.

Find an issue a week later, and want to dig into it? Run 100 machines back on the old tune, and 100 machines with half the difference. See what happens.