Running with vm.overcommit_memory=2

[Avi Kivity]

Ralf Ertzinger wrote:

>Hi.
>
>Rik van Riel <riel at redhat.com> wrote:
>
>  
>
>>You configured the kernel to not overcommit memory, so it won't.
>>It makes sure that all the memory that was requested is available
>>for programs to use, regardless of whether programs actually use it.
>>    
>>
>
>Is the amount of memory that 'free' reports as 'free' (or /proc/meminfo
>states as 'MemFree:') the amount of unrequested memory, or does it include
>requested but not actually used memory?
>  
>
used memory includes file-backed (cached) memory, and kernel memory, so 
'free' does not fit any of your descriptions.

>If the latter, where can one see the amount of unrequested memory?
>
>  
>
total requested memory is in /proc/meminfo:Committed_AS, which is 
limited by swap + half ram. subtract the former from the latter to see 
how far you can go.



-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.