High Load average in Linux kernel 2.6.26 even cpu time is available?

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http://serverfault.com – I have 2 machine. both the machine I have kernal 2.6.26. Both machines are getting more then 300 load averages even cpu idle time is 80%-90%. In the wa column also very less. The followings are top command headers of different time. top - 12:02:27 up 144 days, 14:07, 0 users, load average: 208.28, 123.16, 95.3 Tasks: 630 total, 162 running, 466 sleeping, 0 stopped, 2 zombie Cpu(s): 4.2%us, 1.0%sy, 0.2%ni, 93.9%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 3108296k total, 2988684k used, 119612k free, 1528k buffers Swap: 5855684k total, 1741440k used, 4114244k free, 53656 (HowTos)