这是SLES11sp3系统。
命令top显示平均负载为17+,如下图:
#top
top - 11:59:14 up 19 days, 21:55, 40 users, load average: 17.09, 17.29, 19.22
Tasks: 514 total, 1 running, 512 sleeping, 1 stopped, 0 zombie
Cpu(s): 0.0%us, 0.1%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 63996M total, 50885M used, 13111M free, 2M buffers
Swap: 7999M total, 2M used, 7997M free, 47864M cached
然而 sar 输出显示负载非常低:
#sar
11:50:01 AM all 2.31 0.00 0.19 0.01 0.00 97.49
12:00:01 PM all 0.91 0.00 0.13 0.00 0.00 98.96
负载有这么大差异的可能原因是什么?