• The system scores each process by how much the system would gain from eliminating it.
  • Finally, when it comes to the low memory state, the kernel kills the process of the highest score.
  • The score is located in /proc/PID/oom_score

Controlling OOm

Docs - With choom

choom -n 300 firefox

etc - Using etc /etc/systemd

[!example]

Processes over-allocation

• When process starts it usually request more memory from the then it need kernel
  • Kernel knows about it so it over allocates the memory
    • It may allocate 8.5Gb in a 8Gb system