[Users] Need help configuring memory parameters

[John Drescher]

On Thu, Jun 3, 2010 at 1:40 PM, Tomas Lund <tlund at nxs.se> wrote:
> Hello,
>
> I recently started using OpenVZ on a new server and I am having a really
> hard time understanding all the memory configuration options. I have read
> several different web pages and finally thought I understood it, but I am
> having problems with applications in my container claiming they can not
> allocate memory while "top" shows lots of free memory.
>
> Both VE0 and the container are running 64-bit Debian Squeeze with the
> 2.6.32-5-openvz-amd64 kernel from Debian unstable.
>
> The only running container (currently) has 3Gbyte allocated (server has
> 8Gbyte). It is running MySQL, Apache and a teamspeak3 server. top indicates
> that only about 300Mbyte memory is used. I was expecting, and would like to,
> only use 512Mbytes of memory for this container.
>
> Tasks: 29 total, 1 running, 27 sleeping, 1 stopped, 0 zombie
> Mem: 3145728k total, 265704k used, 2880024k free, 0k buffers
>
>  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  345 mysql     20   0  236m  55m 7808 S    0  1.8  12:40.74 mysqld
> 27713 www-data  20   0  215m  17m 3472 S    0  0.6   0:00.18 apache2
> 27715 www-data  20   0  215m  17m 3488 S    0  0.6   0:00.14 apache2
>  6005 root      20   0  206m  12m 7296 S    0  0.4   0:10.80 apache2
>
> Full config, top output and "dmesg" from the OOM-scenario is posted at
> http://tlund.pp.se/openvz.txt
>
> I would very much appreciate any input on what is wrong in my config, and
> how to fix it.
>

cat /proc/user_beancounters

and see if any of the parameters failed.
John