Tuning GRUB Parameters

Modify the GRand Unified Bootloader (GRUB) configurations, including the nohz, cgroup_disable, idle, and numa parameters, to optimize the OS startup and running performance.

1. Modify the GRUB configuration file.
   1. Open the file.

      vim /etc/default/grub

   2. Press i to enter the insert mode and modify the startup parameters.
      Find the GRUB_CMDLINE_LINUX line in the file and add the following content:

      nohz=off cgroup_disable=files idle=poll

      Delete the following content:

      numa=off

   3. Press Esc, type :wq!, and press Enter to save the file and exit.
2. Generate a new GRUB configuration file.

   grub2-mkconfig -o /boot/efi/EFI/bclinux/grub.cfg

3. Restart the OS for the GRUB configuration modification to take effect.

   reboot

4. Check whether the modifications take effect.
   After the OS is restarted, check the /proc/cmdline file. If the file contains nohz=off cgroup_disable=files idle=poll, and numa=off is deleted, the modification has taken effect.

   cat /proc/cmdline