RAM Usage

[elduderino9]

So, should the buffers/cache be low or high for optimal system performance?

[Akoellh]

Just leave it as it is.

(Honestly, I even don't know if/how you can influence this easily.)

[elduderino9]

Oh I'm done messing with it. Everything seems to be running ok. I'm just wondering so I know what I'm looking at.

[Confuseling]

The cache is just cache... It uses what it can, but it drops it seamlessly when required so you shouldn't notice.

You can clear it out, should you particularly need to.

Drop Caches - linux-mm.org Wiki

You can also install preload, if you want to use it slightly more intelligently - this should make programs open faster at the sacrifice of a slightly longer boot.