A few tips to reduce RAM usage from a fresh install. Numbers are from a fresh install of U- MATE 22.04.1 after complete update using htop. Reduction numbers come from making the change, rebooting, and letting the system settle down
Base RAM usage fresh install - 688 MB
- Use MATE Tweak to change the panel layout to Traditional from Familiar. Traditional uses the least RAM. Reduction - 10 MB.
- Go to Control Center -> Startup Applications and uncheck Blueman Applet. Obviously you wouldn't do this if you need Bluetooth. Reduction - 40 MB.
- Go to Software Boutique and delete Evolution. Again, if you use Evolution you would not want to do this. Reduction - 17 MB
- If you do 3 above you will still have evolution software running. You can purge the rest of Evolution by going to the terminal and typing "sudo apt purge evolution*" . Reduction - 40 MB.
Total reduction 107 MB down to 581 MB. Nothing earth shattering but it's there.
I think the surprises for me were 1 and 4.
Best of Luck