本文介绍了如何通过top命令高效地监控Linux系统的运行状态，并详细解释了top显示的各种统计数据的意义。此外，还提供了检查脏页大小的方法，即通过查看/proc/<pid>/smaps文件。
1. top ->'f' ->'v'
http://www.linuxforums.org/articles/using-top-more-efficiently_89.html.
Note: On 2.6.x, this field is always zero without unknown reason.
2.you can check the size of dirty pages by checking /proc/<pid>/smaps
http://www.linux.com/learn/tutorials/42048-uncover-the-meaning-of-tops-statistics
http://www.linuxforums.org/articles/using-top-more-efficiently_89.html.
Note: On 2.6.x, this field is always zero without unknown reason.
2.you can check the size of dirty pages by checking /proc/<pid>/smaps
http://www.linux.com/learn/tutorials/42048-uncover-the-meaning-of-tops-statistics
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