4 ms·
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 main
by pron 8y ago
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 8y agoIt’s not clear what you mean by a distributed system in this context, but RAM is used for caching, costs or no.
- pron 8y agoMy 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.