Well I'm pretty confused with the memory usage in ubuntu (probably linux in general)
TL;DR: Memory usage is 70%. When ich check top, htop, ps aux etc. I can see there should be a memory usage of ~10%.
Why is anyone saying my usage is around 70%? What do I've to understand to get this?
UPDATE:
free -h
total used free shared buffers cached
Mem: 7.8G 7.4G 419M 760K 851M 730M
-/+ buffers/cache: 5.8G 2.0G
Swap: 0B 0B 0B
###########################################################################
top -b n1 | head -n 5
top - 15:16:53 up 13:09, 2 users, load average: 1.49, 1.43, 1.52
Tasks: 258 total, 1 running, 257 sleeping, 0 stopped, 0 zombie
%Cpu(s): 4.8 us, 1.9 sy, 0.0 ni, 92.2 id, 0.8 wa, 0.0 hi, 0.3 si, 0.0 st
KiB Mem: 8169808 total, 7740972 used, 428836 free, 871604 buffers
KiB Swap: 0 total, 0 used, 0 free. 748248 cached Mem
An image of htop, ordered by MEM% – you can see there are 6 of8 gb memory reserved. But when you sum the values of the MEM% column you get a much lower percentage then 6gb.
Best Answer
Type
free -hin console. You will get something like this:total used free shared buffers cached Mem: 15G 9,1G 6,1G 270M 524K 7,6G -/+ buffers/cache: 1,5G 13G Swap: 0B 0B 0BThe first line says that out of 15G memory installed (marketologist's 16) I have 9 used for apps and 7,6 for filesystem cache. The third line shows that I have swap disabled.