1. root@snic10e:/tmp# while true; do
2. > echo "dnsmasq restart"
3. > service dnsmasq restart
4. > sleep 1
5. > echo "before cache drop:"
6. > free
7. > sleep 1
8. > echo 3 > /proc/sys/vm/drop_caches
9. > sleep 1
10. > echo "after cache drop:"
11. > free
12. > sleep 1
13. > done
14. dnsmasq restart
15. before cache drop:
16. total used free shared buff/cache available
17. Mem: 1991508 87948 1883424 17488 20136 1860172
18. Swap: 0 0 0
19. [ 4129.167679] ash (634): drop_caches: 3
20. after cache drop:
21. total used free shared buff/cache available
22. Mem: 1991508 88004 1883368 17488 20136 1860116
23. Swap: 0 0 0
24. dnsmasq restart
25. before cache drop:
26. total used free shared buff/cache available
27. Mem: 1991508 88344 1882980 17488 20184 1859752
28. Swap: 0 0 0
29. [ 4133.589184] ash (634): drop_caches: 3
30. after cache drop:
31. total used free shared buff/cache available
32. Mem: 1991508 88360 1882964 17488 20184 1859736
33. Swap: 0 0 0
34. dnsmasq restart
35. before cache drop:
36. total used free shared buff/cache available
37. Mem: 1991508 89720 1881604 17488 20184 1858376
38. Swap: 0 0 0
39. [ 4138.010682] ash (634): drop_caches: 3
40. after cache drop:
41. total used free shared buff/cache available
42. Mem: 1991508 89576 1881748 17488 20184 1858520
43. Swap: 0 0 0
44. dnsmasq restart
45. before cache drop:
46. total used free shared buff/cache available
47. Mem: 1991508 89868 1881468 17480 20172 1858240
48. Swap: 0 0 0
49. [ 4142.434119] ash (634): drop_caches: 3
50. after cache drop:
51. total used free shared buff/cache available
52. Mem: 1991508 89840 1881488 17488 20180 1858260
53. Swap: 0 0 0
54. dnsmasq restart
55. ^C
56. root@snic10e:/tmp#