grep ‘parking to wait for‘ gs2_jstack_141203.txt | uniq -c | sort -n
查看哪个锁出现次数最多
http://blog.csdn.net/happygongzhuo/article/details/6808982
To display line numbers along the left side of a window, type any one of the following command while using text editor:
:set number
or
:set nu
http://stackoverflow.com/questions/9443694/how-to-add-line-number-for-a-output
原文：http://www.cnblogs.com/jvava/p/4142157.html