Find Ram details in Linux Os

Ram details in Linux Os

Ram details are findout from some commands.  memory usage,free memory,memory allocation,cache and buffers ram details are given below commands.

1. free
2. top
3. cat/proc/meminfo
4. vmstat -s

Using this comands and output
 

free

            total       used       free     shared    buffers     cached
Mem:       2054760    1881344     173416          0      78776     799228
-/+ buffers/cache:    1003340    1051420
Swap:      1037308       6312    1030996

 

top

top - 12:08:09 up  1:25,  2 users,  load average: 0.45, 0.77, 0.91
Tasks: 177 total,   1 running, 176 sleeping,   0 stopped,   0 zombie
%Cpu(s): 13.0 us,  3.0 sy,  0.0 ni, 83.6 id,  0.4 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:   2054760 total,  1850080 used,   204680 free,    75416 buffers
KiB Swap:  1037308 total,     6608 used,  1030700 free,   771096 cached

 

cat/proc/meminfo

MemTotal:        8027952 kB
MemFree:         3893748 kB
Buffers:          132208 kB
Cached:          1666864 kB
SwapCached:       226556 kB
Active:          1979556 kB
Inactive:        1849480 kB
Active(anon):    1592580 kB
Inactive(anon):   886080 kB
Active(file):     386976 kB
Inactive(file):   963400 kB
Unevictable:          68 kB
Mlocked:              68 kB
SwapTotal:      15624188 kB
SwapFree:       15050964 kB
Dirty:               172 kB
Writeback:             0 kB
AnonPages:       1907548 kB
Mapped:           223484 kB
Shmem:            448696 kB
Slab:             140444 kB
SReclaimable:     101456 kB
SUnreclaim:        38988 kB
KernelStack:        4960 kB
PageTables:        53108 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:    19638164 kB
Committed_AS:    7822876 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      567356 kB
VmallocChunk:   34359151824 kB
HardwareCorrupted:     0 kB
AnonHugePages:         0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:      120832 kB
DirectMap2M:     8118272 kB

 

vmstat -s

      2054760 K total memory
      1862316 K used memory
      1061264 K active memory
       693300 K inactive memory
       192444 K free memory
        75244 K buffer memory
       779128 K swap cache
      1037308 K total swap
         6608 K used swap
      1030700 K free swap
       281388 non-nice user cpu ticks
        22872 nice user cpu ticks
        52646 system cpu ticks
       627953 idle cpu ticks
        10910 IO-wait cpu ticks
            1 IRQ cpu ticks
          376 softirq cpu ticks
            0 stolen cpu ticks
      1034419 pages paged in
       305416 pages paged out
            0 pages swapped in
         1712 pages swapped out
      4131695 interrupts
      7259544 CPU context switches
   1407388367 boot time
         7328 forks