Python 找出占用系統swap的程序

今天程序哥說機器不斷死機，後發現是swap用完了導致，現需要找出哪些進程占用了swap，網上找了一下辦法，就是查看/proc下面的進程號目錄裡面的smaps文件，如下：

tail -n 18 /proc/19454/smaps

1. ffde1000-ffdf6000 rw-p 7ffffffea000 00:00 0 [stack]
2. Size: 84 kB
3. Rss: 8 kB
4. Shared_Clean: 0 kB
5. Shared_Dirty: 0 kB
6. Private_Clean: 0 kB
7. Private_Dirty: 8 kB
8. Swap: 0 kB
9. Pss: 8 kB
10. ffffe000-fffff000 r-xp ffffe000 00:00 0
11. Size: 4 kB
12. Rss: 4 kB
13. Shared_Clean: 4 kB
14. Shared_Dirty: 0 kB
15. Private_Clean: 0 kB
16. Private_Dirty: 0 kB
17. Swap: 0 kB
18. Pss: 0 kB

這裡中間有幾行“Swap 0 kB”，將文件中所有這些行的值加起來就是這個進程占用的SWAP值，有方法了就寫成腳本吧，Python腳本如下：

1. #!/usr/bin/python
2. #coding:utf-8
3. #列出系統進程占用SWAP的情況！
5. import re
6. import sys
7. import os
9. def check(pid):
10. #獲取SWAP大小
11. file_smaps = '/'.join(["/proc",pid,"smaps"])
12. f = open(file_smaps,'r')
13. content1 = f.read()
14. f.close()
15. pattern1 = r'Swap:\s+(.*)\s+kB'
16. find1 = re.compile(pattern1)
17. sum = 0
18. for size in find1.findall(content1):
19. sum = sum + int(size)
21. #獲取進程名稱
22. file_status = '/'.join(["/proc",pid,"status"])
23. s = open(file_status, 'r')
24. content2 = s.read()
25. s.close()
26. pattern2 = r'Name:\s+(.*)'
27. find2 = re.compile(pattern2)
28. name = find2.findall(content2)[0]
30. return name,sum
32. if __name__ == "__main__":
33. print "腳本將列出有占用SWAP的程序ID和占用的SWAP大小："
34. print "%-5s %-10s %s" % ('PID','SWAP(kB)','NAME')
35. print "----------------------------------------------------"
36. for pid in os.listdir("/proc"):
37. if pid.isdigit():
38. name,size = check(pid)
39. if size:
40. print "%-5s %-10s %s" % (pid, size, name)

運行效果如下圖：