[root@iZ2ze7ukvpkonzby0h3wbfZ ~]# cat /proc/meminfo
MemTotal: 16265476 kB //可用的总内存
MemFree: 212936 kB //完全未用到的物理内存 LowFree+HighFree
MemAvailable: 1968228 kB //MemAvailable ≈ MemFree+Buffers+Cached
Buffers: 295584 kB //缓冲区内存数
Cached: 1494920 kB //缓存区内存数
SwapCached: 0 kB
Active: 14561076 kB
Inactive: 579924 kB
Active(anon): 13351228 kB
Inactive(anon): 508 kB
Active(file): 1209848 kB
Inactive(file): 579416 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB //可用的swap空间的总的大小
SwapFree: 0 kB //剩余swap空间的大小
Dirty: 384 kB //需要写入磁盘的内存区大小
Writeback: 0 kB //正在被写回磁盘的大小
AnonPages: 13350500 kB //未映射页的内存大小
Mapped: 120580 kB //设备和文件等映射的大小
Shmem: 1240 kB
Slab: 437004 kB
SReclaimable: 304268 kB
SUnreclaim: 132736 kB
KernelStack: 78080 kB
PageTables: 53668 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 8132736 kB
Committed_AS: 17893748 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 137012 kB
VmallocChunk: 34359496008 kB
Percpu: 2496 kB
HardwareCorrupted: 0 kB
AnonHugePages: 2336768 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 300856 kB
DirectMap2M: 16476160 kB
DirectMap1G: 2097152 kB
