Tweaking Linux Kernel Overcommit Behaviour for memory

You can change the behaviour of the Linux Kernel in regardings to its Overcommit Behaviour for memory. You can change the behaviour at /etc/sysctl.conf/ or /etc/sysctl.d/myconfig.conf

You will write something like

vm.overcommit_memory = (a integer from 0 to 2)

where
0 - means that the kernel will use predefined heuristics when deciding whether to allow such an overcommit. This is the default.
1 -always overcommits (Very dangerous)
2 - Prevents overcommits from exceeding a certain value. Within this mode, the total commit can not exceed the swap space(s) size + overcommit_ratio percent * RAM size. By default, the overcommit ratio is 50.

For example, do look at Memory Management - Preventing the kernel from dishing out more memory than required