Ubuntu 19.10 running a Regolith session feels slow

in Ubuntu 19.10 this problem happens due to problem with swap management . Tinkering with dirty_background broke my nautilus file explorer . Along with freezing when copying large files , i have encountered several performance issues due to bad swap management in 19.10 . Since completely disabling swap is not recommended and we can control the degree of writing into swap partition by setting swappiness .

swappiness=0 tells the kernel to avoid swapping processes out of physical memory for as long as possible . swappiness=100 tells the kernel to aggressively swap processes out of physical memory and move them to swap cache

so , we are going to set swappiness =1 .

To change the swappiness value A temporary change (lost on reboot) with a swappiness value of 1 can be made with

sudo sysctl vm.swappiness=1

To make a change permanent, edit the configuration file with your favorite editor:

sudo gedit /etc/sysctl.conf

Search for vm.swappiness and change its value as desired. If vm.swappiness does not exist, add it to the end of the file like so:

vm.swappiness=10

Save the file and reboot.

This helped me to improve overall performance issues in Ubuntu 19.10 while disabling swap completely eliminated all performance issues that i had with 19.10 but still i won't recommend doing that in normal situations .