[SunHELP] vmstat and "sar -r"

[Vivas Inga, Yovana Mery]

Hi, I understand that the "vmstat" and "sar -r" commands are the same, and
their only difference is that vmstat gives me the data in Kbytes while "sar
-r" in blocks, but when I perform this commands in my Sun 2.5.1. server it
gives me the following:

#vmstat 10 5
 procs     memory            page            disk          faults      cpu
 r b w   swap  free  re  mf pi po fr de sr s0 -- -- --   in   sy   cs us sy
id
 0 0 0    768  1488   0   7  1  0  0  0  0  1  0  0  0  124  365   39  1  0
98
 0 0 0 549344 23872   0   9  0  0  0  0  0  5  0  0  0  155  469   55  1  0
98
 0 0 0 549344 23872   0   0  0  0  0  0  0  0  0  0  0  134  297   35  0  0
100
 0 0 0 549344 23872   0   0  0  0  0  0  0  0  0  0  0  138  293   33  0  0
100
 0 0 0 549344 23872   0   0  0  0  0  0  0  2  0  0  0  145  294   33  0  1
99

#sar -r 10 5
SunOS cw2 5.5.1 Generic_103640-29 sun4u    03/27/01
09:17:57 freemem freeswap
09:18:07    2984  1098688
09:18:17    2984  1098688
09:18:27    2984  1098688
09:18:37    2984  1098688
09:18:47    3070  1101789

Average     3001  1099308

As you can see it's not very clear what value of these is the real one, I
mean, freeswap is almost the same in both results, but it doesn't happen the
same with  freemem, which differences considerably in each command result.
Can anybody please explain me why happens this?
bye,
Mery