Can OOM killer be disabled in RHEL8-based kernels?

Issue

Can OOM killer be disabled in RHEL8-based kernels?

Environment

• RHEL 8
• CloudLinux OS 7 hybrid
• CloudLinux OS 8
  

Solution

Scenario when disabling OOM killer (replacing it with sigkill to be precise) helps reducing overall load on the server cannot happen on 4.x kernel branch because the OOM killer mechanism was reworked and adding oom_reper mechanism makes scenario when OOM killer is called a few times per second is not real. Due to this, replacing OOM killer with sigkill is not needed anymore.

Useful links

https://docs.cloudlinux.com/shared/cloudlinux_os_kernel/#oom-killer-for-lve-processes

https://lwn.net/Articles/666024/