Re: On memory consumption - request for comments

On 02/11/2011 11:01 AM, Hendrik Schumacher wrote:

> I didnt have time yet to read Torsten's post (will do later) but I will
> take a stab at this question. You are missing the difference between
> address space and used memory. Sample extract from /proc/*/smaps:
>
> Size:                884 kB
> Rss:                 536 kB
> Pss:                  17 kB
> Shared_Clean:        536 kB
> Shared_Dirty:          0 kB
> Private_Clean:         0 kB
> Private_Dirty:         0 kB
> Referenced:          536 kB
> Swap:                  0 kB
>
> In this case the address space has a size of 884 kb. Only 536 kb are used
> though (Rss/Referenced). All of this space is shared. As you can see the
> difference between 884 kb and 536 kb is not swapped out but just not
> allocated.

Interesting. I didn't know that. But I think the questions that Torsten 
was posing about what would happen if an admin turned off swap while 
things were running doesn't apply then, right? This memory isn't in 
swap, it's just not in RAM. So turning off swap won't cause the 
shared/unshared sizes to blow up, right?

-- 
Michael Peters
Plus Three, LP