[lxc-users] how does lxc.cgroup.memory.limit_in_bytes affect buffer cache?

[Harald Dunkel]

Hi folks,

AFAIU lxc.cgroup.memory.limit_in_bytes provides a limit for
physical memory allocation within the container (text + heap
+ stack). This is not reserved memory. The containers don't
have a private memory management. A container might run into
swap memory, even though it has not reached this limit yet.

Question is: How do I limit the RAM a container might use for
memory mapped IO and buffer cache? Do I have to worry about
"bad" containers using up all RAM here, leaving none for its
neighbors?


Every insightful comment is highly appreciated
Harri