Linux 서버 메모리 사용량 확인(with. KB, MB, GB)

메모리 사용량 확인 명령어

cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to=iec | sed 's/ kB//g'
MemTotal:            31G
MemFree:            2.0G
MemAvailable:        25G
Buffers:            575M
Cached:              23G
SwapCached:            0
Active:             9.3G
Inactive:            19G
Active(anon):       1.5M
Inactive(anon):     4.9G
Active(file):       9.3G
Inactive(file):      14G
Unevictable:           0
Mlocked:               0
SwapTotal:             0
SwapFree:              0
Dirty:               95M
Writeback:          284K
AnonPages:          4.9G
Mapped:             344M
Shmem:              2.1M
KReclaimable:       721M
Slab:               882M
SReclaimable:       721M
SUnreclaim:         161M
KernelStack:        9.4M
PageTables:          24M
NFS_Unstable:          0
Bounce:                0
WritebackTmp:          0
CommitLimit:         16G
Committed_AS:       6.1G
VmallocTotal:           32T
VmallocUsed:         24M
VmallocChunk:          0
Percpu:             5.5M
HardwareCorrupted:     0
AnonHugePages:         0
ShmemHugePages:        0
ShmemPmdMapped:        0
FileHugePages:         0
FilePmdMapped:         0
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2.0M
Hugetlb:               0
DirectMap4k:        198M
DirectMap2M:        9.1G
DirectMap1G:         23G
nifi@nifi-5:/opt/nifi/nifi-current$ cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to=iec | sed 's/ kB//g' | grep "Swap"
SwapCached:            0
SwapTotal:             0
SwapFree:              0
nifi@nifi-5:/opt/nifi/nifi-current$ cat /proc/meminfo | numfmt --field 2 --from-unit=Ki --to=iec | sed 's/ kB//g' | grep -e "Buffers" -we "Cached"
Buffers:            575M
Cached:              22G