[Users] Need help configuring memory parameters

[Tomas Lund]

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.

Best regards,
Tomas