Memory issues

[SamTzu]

I have been trying to figure this one out by my self but I think I need some help with translation.
One of nested Proxmox servers that has 4 LXC servers running (each using ~1G RAM) claims that it is using 14G out of 16G.
What is the rest of the memory being used?


root@vh0:~# cat /proc/meminfo
MemTotal: 16421184 kB
MemFree: 1963056 kB
MemAvailable: 2682260 kB
Buffers: 16 kB
Cached: 1912052 kB
SwapCached: 0 kB
Active: 4872896 kB
Inactive: 1126140 kB
Active(anon): 4315972 kB
Inactive(anon): 768500 kB
Active(file): 556924 kB
Inactive(file): 357640 kB
Unevictable: 56564 kB
Mlocked: 56572 kB
SwapTotal: 11664376 kB
SwapFree: 11663852 kB
Dirty: 420 kB
Writeback: 0 kB
AnonPages: 4143748 kB
Mapped: 775248 kB
Shmem: 988012 kB
Slab: 1403940 kB
SReclaimable: 116956 kB
SUnreclaim: 1286984 kB
KernelStack: 11808 kB
PageTables: 52652 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 19874968 kB
Committed_AS: 11702332 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 7880536 kB
DirectMap2M: 8892416 kB

 

[whataboutpereira]

Are you running ZFS? If yes, see how much ARC cache is used by ZFS

sudo arcstat