[Devel] Re: [lxc-devel] Memory Resources

[KAMEZAWA Hiroyuki]

On Mon, 24 Aug 2009 12:47:57 +0530
Balbir Singh <balbir at linux.vnet.ibm.com> wrote:

> * KAMEZAWA Hiroyuki <kamezawa.hiroyu at jp.fujitsu.com> [2009-08-24 15:58:35]:
> 
> > On Mon, 24 Aug 2009 08:17:06 +0200
> > Dietmar Maurer <dietmar at proxmox.com> wrote:
> > 
> > > > > how about memsw_limit for swap? :>
> > > > > I am looking for swap usage statistics from cgroup right now from
> > > > > memcontrol.c :) but as you did the idea is good and should be add to
> > > > the
> > > > > kernel and lxc-tools :)
> > > > >
> > > > 
> > > > Hmm, why meminfo is necessary ? For cheating top/free/... etc ?
> > > 
> > > Many servers use that info to control the use of resources. For example, they do not span any more server processes if memory is low.
> > > 
> > > If you do not have that info correct, all those programs fails (they try to allocate much more resources than available).
> > > 
> > 
> > Hm, duplicating information for keeping binary compatibility for apps ?
> > What other stat does ? 
> > For example, 
> > 	- load average
> > 	- cpu usage %user, %sys, %iowait, etc..
> > 	- fork-per-sec
> > 
> > One difficulty I think of is that memcg's limit-usage doesn't means "free".
> > But, hmm, showing "meminfo" in popular/user-friendly format is not very bad.
> > Balbir, how do you think ?
> >
> 
> Sorry, I've missed the context and unable to follow the discussion.
> IIUC, the request is to show per-container statistics?
>  
per-container "meminfo" i.e. the same format information as "meminfo".
(Then, duplicating information of memory.stat")

Thanks,
-Kame