vmstat reports zero swpd

Clark, Eugene Eugene.Clark at bestsoftware.com
Tue Nov 19 11:03:00 CST 2002


I have a PowerEdge 1650, dual 1400Mhz PIII, Perc 3/Di, RAID 1.
It is running RedHat 7.3, kernel 2.4.18-17.7.x custom

When I run vmstat, it reports that the swpd value is zero.
In /proc/meminfo, the used amount is near the total available.
Both report a high 'cache' value and there is no swap activity reported
anywhere.

Can someone please explain to me what these stats mean? 
And how I can, if possible, get more accurate memory stats.

# vmstat 2
   procs                      memory    swap          io     system
cpu
 r  b  w   swpd   free   buff  cache  si  so    bi    bo   in    cs  us  sy
id
 1  0  0      0  13508  78808 632872   0   0    25    25  270   108   3   1
96
 1  1  0      0  13516  78808 632880   0   0     4   984  766   676  46   1
53
 1  0  0      0  13508  78808 632892   0   0     0   184  587   347  51   1
48
 1  0  0      0  13504  78816 632872   0   0     0   490  656   394  49   1
51
 1  0  0      0  13504  78816 632880   0   0     4    42  532   204  50   0
50
 1  0  0      0  13504  78832 632872   0   0     0   158  546   234  50   0
50
 1  0  0      0  13504  78832 633460   0   0     0   325  598   344  49   1
51

# cat /proc/meminfo  
        total:    used:    free:  shared: buffers:  cached:
Mem:  1056432128 1043079168 13352960        0 75939840 653910016
Swap: 1077469184        0 1077469184
MemTotal:      1031672 kB
MemFree:         13040 kB
MemShared:           0 kB
Buffers:         74160 kB
Cached:         638584 kB
SwapCached:          0 kB
Active:         628936 kB
Inact_dirty:    145496 kB
Inact_clean:    199320 kB
Inact_target:   194748 kB
HighTotal:      131008 kB
HighFree:         1024 kB
LowTotal:       900664 kB
LowFree:         12016 kB
SwapTotal:     1052216 kB
SwapFree:      1052216 kB
Committed_AS:   443840 kB


-----------------------------
Eugene Clark
Best Software SPD




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