查看Linux的内存状态

命令

cat /proc/meminfo

结果

MemTotal:        8079524 kB    # 当前可用RAM的大小（物理内存减去预留位和内核到二进制代码大小）
MemFree:          163488 kB    # 当前未被系统使用到内存
MemAvailable:    2349460 kB    
Buffers:          291064 kB
Cached:          2829708 kB
SwapCached:            0 kB
Active:          5966016 kB
Inactive:        1442444 kB
Active(anon):    4229832 kB
Inactive(anon):   882944 kB
Active(file):    1736184 kB
Inactive(file):   559500 kB
Unevictable:         192 kB
Mlocked:             192 kB
SwapTotal:       2097148 kB    # 交换空间大小
SwapFree:        2097148 kB
Dirty:               656 kB
Writeback:             0 kB
AnonPages:       4287892 kB
Mapped:          1150712 kB
Shmem:            825672 kB
Slab:             283452 kB
SReclaimable:     193948 kB
SUnreclaim:        89504 kB
KernelStack:       23120 kB
PageTables:       120904 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     6136908 kB
Committed_AS:   15970468 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
Hugetlb:               0 kB
DirectMap4k:      466204 kB
DirectMap2M:     7833600 kB
DirectMap1G:     1048576 kB