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KernelTrap: Automatically-Shrinking Caches

Aug 09, 2002, 08:00 (8 Talkback[s])


Desktop-as-a-Service Designed for Any Cloud ? Nutanix Frame

"Andreas Gruenbacher posted a patch to lkml that would allow for 'dynamically sized caches that shrink under pressure' (caches that shrink when available physical memory is low). This feature seems a bit controversial, since the traditional approach has always been to cache as much as possible, and to swapout under pressure. The rationale is that you want to have as much cache in RAM, to reduce disk access.

"Members of the other party, however, argue that having too much cache on disk is counterproductive; and that it is better to free unused cache under pressure.

"It looks like this patch will make it in, though. Quoth Linus: 'Yah, it's a guess. We can test it...'"

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