Messages in this thread |  | | | From | Rusty Russell <> | | Subject | Re: How to get a sense of VM pressure | | Date | Sun, 27 Jul 2008 16:43:31 +1000 | |
On Saturday 26 July 2008 03:55:36 Jeremy Fitzhardinge wrote:
> So I guess what I need is some measurement of "memory use" which is
> perhaps akin to a system-wide RSS; a measure of the number of pages
> being actively used, that if non-resident would cause a large amount of
> paging. If you shrink the domain down to that number of pages + some
> padding (x%?), then the system will run happily in a stable state. If
> that number increases, then the system will need new memory soon, to
> stop it from thrashing. And if that number goes way below the domain's
> actual memory allocation, then it has "too much" memory.
Like everyone, I've thought about this. The shrinker callbacks seem like a
candidate here; have you played with them at all?
Some dynamic tension between the shrinker callback and slow feed of pages to
the balloon seems like it should work...
Rusty.
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