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Apple Computing Products:
macOS - Operating System
Time Machine slows down my iMac
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<blockquote data-quote="giulio" data-source="post: 526926" data-attributes="member: 28677"><p>About fighting for resources...</p><p></p><p>Accessing a HDD is like OS8 using a CPU. Everything fights with no priority.</p><p></p><p>We can now prioritize CPU threads and give out cycles accurately. However a HDD does not work like that. Even if a process is niced at 20, if it asks for a file, a process niced at -20 must wait. It's pretty inefficient.</p><p></p><p>So if TM is doing a decent amount of backing up, and you're running disk intensive processes, you will surely feel the pain.</p></blockquote><p></p>
[QUOTE="giulio, post: 526926, member: 28677"] About fighting for resources... Accessing a HDD is like OS8 using a CPU. Everything fights with no priority. We can now prioritize CPU threads and give out cycles accurately. However a HDD does not work like that. Even if a process is niced at 20, if it asks for a file, a process niced at -20 must wait. It's pretty inefficient. So if TM is doing a decent amount of backing up, and you're running disk intensive processes, you will surely feel the pain. [/QUOTE]
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Apple Computing Products:
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Time Machine slows down my iMac
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