查看LINUX的可用内存,cached

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$cat /proc/meminfo 
MemTotal:        3096852 kB
MemFree:           84432 kB
Buffers:          462308 kB
Cached:          1923220 kB
SwapCached:       107536 kB
Active:          1574184 kB
Inactive:        1278104 kB
Active(anon):     287692 kB
Inactive(anon):   180092 kB
Active(file):    1286492 kB
Inactive(file):  1098012 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:       2236360 kB
HighFree:          11528 kB
LowTotal:         860492 kB
LowFree:           72904 kB
SwapTotal:       1767108 kB
SwapFree:        1397980 kB
Dirty:              8200 kB
Writeback:             0 kB
AnonPages:        398668 kB
Mapped:            79288 kB
Slab:             124400 kB
SReclaimable:     102956 kB
SUnreclaim:        21444 kB
PageTables:        12260 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     3315532 kB
Committed_AS:    2183464 kB
VmallocTotal:     122880 kB
VmallocUsed:        3156 kB
VmallocChunk:     118812 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       4096 kB
DirectMap4k:       16376 kB
DirectMap4M:      892928 kB
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