This is server1: working great.
[root@mx1 /]# iostat
Linux 2.6.9-11.ELsmp 11/21/2005
avg-cpu: %user %nice %sys %iowait %idle
8.29 0.01 2.35 0.71 88.63
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 53.03 21.35 923.22 78593914 3398126118
[root@mx1 /]# vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
3 0 6284 104220 40660 184872 0 0 5 3 3 2 8 2 89 1
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This is machine2:
[root@mx3 tmp]# iostat
Linux 2.6.9-22.0.1.ELsmp 11/21/2005
avg-cpu: %user %nice %sys %iowait %idle
14.27 0.00 4.64 57.08 24.01
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 131.18 2271.35 1132.00 3734281 1861102
[root@mx3 tmp]# vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 10 152008 470212 892 25168 716 97 1137 565 1253 419 14 5 24 57
[root@mx3 tmp]# sar
10:29:11 AM LINUX RESTART
10:30:02 AM CPU %user %nice %system %iowait %idle
10:40:19 AM all 11.28 0.00 3.68 81.72 3.31
10:50:01 AM all 17.22 0.00 5.52 39.15 38.11
Average: all 14.17 0.00 4.57 61.07 20.19
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Both servers runs sendmail+mailscanner