meminfo - whats this for
MemTotal: 8180384 kB
MemFree: 3907364 kB
MemAvailable: 6301812 kB
Buffers: 223884 kB
Cached: 1997916 kB
SwapCached: 0 kB
Active: 2590052 kB
Inactive: 1128720 kB
Active(anon): 1512552 kB
Inactive(anon): 17828 kB
Active(file): 1077500 kB
Inactive(file): 1110892 kB
Unevictable: 17580 kB
Mlocked: 17580 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 944 kB
Writeback: 0 kB
AnonPages: 1514616 kB
Mapped: 513924 kB
Shmem: 25212 kB
Slab: 318448 kB
SReclaimable: 248656 kB
SUnreclaim: 69792 kB
KernelStack: 5328 kB
PageTables: 30204 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 4090192 kB
Committed_AS: 4289376 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 329508 kB
VmallocChunk: 34358947836 kB
HardwareCorrupted: 0 kB
AnonHugePages: 438272 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 306752 kB
DirectMap2M: 4935680 kB
DirectMap1G: 3145728 kB