So, few weeks after having this MacBook Air with horrid screen, I figured out that there is a small issue with RAM. 2 tasks permanently eating 2GB of RAM, effectively reducing 8GB of RAM this machine has, to only 6GB (which sadly isn’t enough these days, especially not for a power user, who wants to use Firefox and also some other programs – Mozilla expects that firefox is all you need, so it deliberately uses all free RAM you have :)).
The problem was with these 2:
- Kernel task – obviously a kernel, but why does it need 1GB? I need to figure that out later
- mdm_store – process belonging to “spotlight” which is some searching / suggestion feature I will never use
So I found some information about spotlight and people who wanted to disable to protect privacy. While I completely don’t care about that, I do care about my RAM, so here is how you can kill it permanently. Open a terminal and put there:
sudo mdutil -a -i off ps -ef | grep mdm # then kill the pids of mdm processes
Here we go, 1GB of RAM back for use!