I didn't say it's free, only that it's relatively cheap. That RAM can simply be ... | Hacker News

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		pron on May 9, 2019 \| parent \| context \| favorite \| on: For Better Computing, Liberate CPUs from Garbage C... I didn't say it's free, only that it's relatively cheap. That RAM can simply be used for caching is incorrect, though. There are very-non-neglible costs to maintaining caches in distributed systems.

benchaney on May 9, 2019 [–]

It’s not clear what you mean by a distributed system in this context, but RAM is used for caching, costs or no.

pron on May 9, 2019 | [–]

My point is that you can't increase the cache size indefinitely to get performance improvements, because you also have to handle cache invalidation. There is an optimal working set.

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