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

locks