Why am I not seeing all of my plans memory in Centos 8

Linode Staff

I deployed the Linode Centos 8 distribution to a brand new Linode today and I am not seeing the proper amount of memory (RAM) being allocated to my system when reviewing the output of cat /proc/meminfo.

MemTotal: 1873176 kB MemFree: 1484456 kB MemAvailable: 1578152 kB

Can you provide some insight as to why this may be happening and how I can resolve it?

1 Reply

The Centos 8 distro has kdump enabled by default which reserves a small amount of memory for creating crash dumps in case the kernel crashes unexpectedly. "The system kernel's memory image is preserved across the reboot and is accessible to the dump-capture kernel"[1] using kexec.

You can make all of the memory allocated to your Linode visible by following the process below:

1) Run systemctl disable kdump
2) Remove the crashkernel=auto parameter from the GRUB_CMDLINE_LINUX line in /etc/default/grub
3) Run grub2-mkconfig -o /boot/grub2/grub.cfg
4) Reboot

I hope this helps. Please let us know if you have any questions.


Please enter an answer

You can mention users to notify them: @username

You can use Markdown to format your question. For more examples see the Markdown Cheatsheet.

> I’m a blockquote.

I’m a blockquote.

[I'm a link] (https://www.google.com)

I'm a link

**I am bold** I am bold

*I am italicized* I am italicized

Community Code of Conduct