Arista EOS Memory Util%

https://eos.arista.com/introduction-to-managing-eos-devices-memory-utilisation/

经常Arista Switch会显示Mem Util% at 70%，特别是低端的Switch。其实没有用到，而是Linux Caching System把他们Reserve到Cache和Buffer里面。下面红字的都是Free Mem

------------- show processes top memory once -------------

top - 01:14:08 up 21 days,  1:18,  1 user,  load average: 0.62, 0.39, 0.41
Tasks: 310 total,   1 running, 252 sleeping,   0 stopped,  57 zombie
%Cpu(s): 10.3 us,  2.0 sy,  0.0 ni, 87.3 id,  0.0 wa,  0.3 hi,  0.0 si,  0.0 st
KiB Mem:   3900776 total,  3730136 used,   170640 free,   201908 buffers
KiB Swap:        0 total,        0 used,        0 free,  2034600 cached

ckp348.jhm.ebgp.profB.WORKING.05:46:31#sh proc top mem once
top - 05:46:40 up 25 days,  7:21,  2 users,  load average: 0.42, 0.25, 0.24
Tasks: 289 total,   2 running, 287 sleeping,   0 stopped,   0 zombie
%Cpu(s):  4.4 us,  0.7 sy,  0.0 ni, 94.1 id,  0.0 wa,  0.2 hi,  0.5 si,  0.0 st
KiB Mem:   7931828 total,  4395336 used,  3536492 free,   218976 buffers
KiB Swap:        0 total,        0 used,        0 free,  2371220 cached