Not able to allocate swap memory

Question

Suddenly my vm will get extremely slow and disk read operations will sky rocket.
After some digging around, it's because of insufficient ram.
One recommended solution was to create a swap file.
I followed the steps mentioned in the below link but swap memory is not getting created. In htop, it's showing 0k/0k Swp.

https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/oom-swap-file-linux-vm

Answer 1

I think the tutorial is incomplete - not covering all possible situations.
Linux uses a different partition for swap. If you did not created that at system install then later might not be possible.

Can you try to follow the tutorial on a brand new VM?

Hope this helps.