Memory RAM (with Cache)

[djlive]

Hi i have this Memory RAM (with Cache): 7.31GB / 8GB ( 91.4%). my question is : is that a problem? why it is so high and eventualy how to resolve this. thanks in advance

[cinique]

Money to throw at a well specified server but with no inherent knowledge on how to administer it. 
https://www.linuxatemyram.com/