[CentOS] vmstat and loadavg disagree about system load

1  4 499492 150392   4496 4763380    0    0   192   552 1227 1094  2  0 75 24  0
0  5 499492 150656   4500 4763528    0    0     0   160  465  263  1  0 68 30  0
0  5 499492 150468   4500 4763532    0    0     0     0  177   93  1  0 69 31  0
1  5 499492 151020   4500 4763540    0    0     0     0  160  132  0  0 69 31  0
1  5 499492 151268   4500 4763540    0    0     0     0  304  143  1  0 69 30  0
0  5 499492 151368   4500 4763540    0    0     0   344  369  192  0  0 69 31  0
0  1 499492 145020   4512 4771032    0    0  6260  1428 2013 2613  4  1 79 17  0
2  0 499492 140432   4512 4769396    0    0 31872    72 2393 2796  8  1 87  3  0
1  0 499500 137332   4512 4769432    0    8 25984    80 2052 2012  8  1 90  1  0
1  0 499508 132992   4512 4772592    0    8 24960   384 2325 2344  8  1 90  1  0
3  0 499520 135720   4400 4768792    0   12 24840   252 2491 2345  9  1 89  1  0
0  2 499520 210740   4404 4693096    0    0 15904   384 1798 1513  6  1 90  4  0
1  2 499520 210856   4404 4693636    0    0     0     0  154  119  0  0 87 12  0
0  2 499520 211328   4404 4693832    0    0     0     0  128  119  0  0 87 13  0
0  2 499520 212080   4404 4693832    0    0     0     0  128  144  0  0 87 12  0
0  2 499520 212700   4404 4693836    0    0     0     0  115  135  0  0 87 13  0
0  2 499520 213196   4404 4693836    0    0     0   336   88  102  0  0 87 12  0
2  0 499520 202552   4416 4704504    0    0  7984 17852 2036 1828  6  1 87  7  0
2  0 499520 172800   4416 4733208    0    0 25744   128 2165 2094  9  1 89  2  0
2  0 499520 153872   4416 4754468    0    0 18816   392 2000 1996  7  0 88  4  0
3  0 499520 169620   4416 4738300    0    0 27520   480 2346 2248  9  1 90  1  0
2  0 499520 140260   4416 4765328    0    0 24584   224 2247 2231  9  1 90  1  0
0  2 499520 179204   4416 4725748    0    0 17164  3564 1701 1619  5  1 87  8  0
0  2 499520 179948   4416 4725488    0    0     0     0  209  131  1  0 87 13  0
0  2 499520 180072   4416 4725492    0    0     0     0  111  117  0  0 87 12  0
0  2 499520 180436   4416 4725492    0    0     0     0   71   81  0  0 87 13  0
0  2 499520 180560   4416 4725492    0    0     0     0  182  110  0  0 87 13  0
0  1 499520 180180   4416 4725492    0    0     0   344  315  179  0  0 87 12  0
2  0 499520 182196   4428 4731300    0    0  2944  1108 1828 1935  6  0 86  8  0
1  0 499520 150180   4428 4757292    0    0 23936    88 2038 1905  7  1 88  4  0
2  0 499520 157264   4428 4751916    0    0 23568   176 2324 2139  8  1 87  5  0
1  2 499520 135936   4428 4770852    0    0 27144   120 2428 2449  9  1 85  6  0
2  1 499520 148336   4428 4761668    0    0 19072   192 2281 2420  8  1 83  8  0
0  2 499520 156408   4432 4749652    0    0 12416   436 1303 1235  3  0 86 11  0
^C
[root at idm-amst-db-12 ~]# ^C
[root at idm-amst-db-12 ~]# ^C
[root at idm-amst-db-12 ~]# uptime
01:47:47 up 26 days,  4:21,  1 user,  load average: 26.85, 22.12, 19.38
[root at idm-amst-db-12 ~]# uptime
01:47:58 up 26 days,  4:21,  1 user,  load average: 24.38, 21.74, 19.29
[root at idm-amst-db-12 ~]# cat /proc/loadavg
25.40 22.05 19.45 1/555 13911

Sincerely,
Mingfei Hua