- June 23, 2018
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!
There is this new ongoing trend, forced by Apple and companies that follow Apple, that everything must be wireless. Your headphones, your charger, phone, everything. No more cables.
Sure this is a step forward, no more cables, sounds really cool – but is the technology we have now ready for it? I don’t think so, for multiple reasons:
Everything that is wireless must have a battery inside, otherwise it will not operate since it needs power. Can we create batteries that are eco-friendly and last forever? Nope.
For each wireless gadget we need to create a battery, which is actively harming environment, the battery adds to complexity and weight of the item and it is soon (within 5 years) going to wear out and whole thing becomes unusable. Not a big deal for large corporations like Apple that wish their consumers renewed (buy new) gadgets every year or two. The battery waste (old batteries) are also not very eco-friendly.
Wireless charging is least efficient charging that was ever invented. Not that typical charging was efficient, even that is wasting lot of energy, from total energy produced by power plant that is taken by a charger, only few percent is actual energy stored in a battery. But it’s even worse with wireless, the charger consumes huge amount of power just to store tiny amount of it in battery and it’s extremely slow.
These 2 things combined make wireless one of most disastrous innovation from ecological point of view – just image what would happen if everyone switched to wireless gadgets, the vast amount of used batteries and energy overhead from wireless charging would put huge impact on environment. Wireless may be a future, but technology is not yet there to use it in eco-friendly manner.