Calculating per jail memory usage ...

[Menshikov Konstantin]

Marc G. Fournier wrote:
>
> Are there any tools for this that are either in ports, or others would 
> like to share?
>
> ----
> Marc G. Fournier           Hub.Org Networking Services 
> (http://www.hub.org)
> Email . scrappy at hub.org                              MSN . 
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Hi.
You can consider memory occupied with processes in jail as sum RSS of 
these processes, but it is wrong.

Processes divide memory among themselves, a segment of the text or all 
memory (if not to do exec after fork).

Now in a kernel there is no mechanism with which help it is possible to 
count a memory size occupied with processes in jail.
After this mechanism will appear, it will be possible to add top :)

There is a patch for restriction of resources jail, 
http://wiki.freebsd.org/Jails, CPU + RAM Limits for Current.
In it, it is considered memory which is used by processes in jail.
Further using a system call jail_get it is possible to receive a memory 
size used jail.
The program jget thus works.
Example

[root at book /home/kostjn]# ./jget.o 1
Jail limits and rusage, jid = 1
Limits: CPU 5, MEM 64M, NPROC 128, NOFILE 512
Usage: CPU 0, MEM 6M, NPROC 9, NOFILE 65


--
Menshikov Konstantin