High load average, low CPU usage - why?

http://serverfault.com/questions/365061/high-load-average-low-cpu-usage-why

http://www.linuxquestions.org/questions/linux-newbie-8/high-cpu-load-but-low-cpu-usage-high-idle-cpu-902632/

https://issues.apache.org/jira/browse/LOG4J2-571

 http://www.linuxjournal.com/article/9001

http://www.miui.com/thread-529151-1-1.html

http://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000/00143208573480558080fa77514407cb23834c78c6c7309000

http://stackoverflow.com/questions/666783/how-to-find-out-which-process-is-consuming-wait-cpu-i-e-i-o-blocked

http://stackoverflow.com/questions/1338499/java-i-o-consumes-more-cpu-resource