OOM killer is invoked by the kernel when the system runs out of memory
| File | Description |
|---|---|
| oom_adj | Since Linux Kernel 2.6.36 this file has been deprecated. The new file is oom_score_adj |
| oom_score_adj | This file can be used to adjust the 'badness' which is used to select a process to kill in out-of-memory conditions 0 (never kill) - 1000 (always kill) If a task is using all its allowed memory, its badness score will be 1000, if its using hald of its allowed memory, its score will be 500 The value of oom_score_adj is added to the badness score to determine which task to kill Range -1000 to +1000 where '-' is always 0 (never killed) |
| oom_score | This displays the current score that the kernel has given to a process. The process score can increase or decrease depending on the following factors: - whether the process creates a lot of children using fork(2) (+); - whether the process has a low nice value (i.e., > 0) (+); - whether the process has been running a long time, or has used a lot of CPU time (-); - whether the process is privileged (-); - whether the process is making direct hardware access (-) |
Highest value in the file is killed first.
New process inherits its parents oom value.