Linux vmstat監控系統負載

使用vmstat監控系統負載

環境：

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1. [Oracle@simpleit ~]$ uname -a
2. Linux simpleit.domain.cn 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 athlon i386 GNU/Linux
3. [oracle@simpleit ~]$ cat /etc/RedHat-release
4. CentOS release 5.5 (Final)

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1. [oracle@simpleit ~]$ vmstat 5 5
2. procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
3. r b swpd free buff cache si so bi bo in cs us sy id wa st
4. 0 0 0 346220 28848 493544 0 0 109 55 1014 155 0 1 98 1 0
5. 0 0 0 346220 28848 493544 0 0 0 21 698 93 0 0 100 0 0
6. 0 0 0 346220 28856 493544 0 0 0 48 703 102 0 0 100 0 0
7. 0 0 0 346220 28856 493544 0 0 0 21 693 94 0 0 100 0 0
8. 0 0 0 346220 28860 493544 0 0 0 30 701 95 0 0 100 0 0
10. DESCRIPTION
11. vmstat reports information about processes, memory, paging, block IO, traps, and cpu activ-ity.
13. FIELD DESCRIPTION FOR VM MODE
14. Procs
15. r: The number of processes waiting for run time.
16. b: The number of processes in uninterruptible sleep.
18. Memory
19. swpd: the amount of virtual memory used.
20. free: the amount of idle memory.
21. buff: the amount of memory used as buffers.
22. cache: the amount of memory used as cache.
23. inact: the amount of inactive memory. (-a option)
24. active: the amount of active memory. (-a option)
26. Swap
27. si: Amount of memory swapped in from disk (/s).
28. so: Amount of memory swapped to disk (/s).
30. IO
31. bi: Blocks received from a block device (blocks/s).
32. bo: Blocks sent to a block device (blocks/s).
34. System
35. in: The number of interrupts per second, including the clock.
36. cs: The number of context switches per second.
38. CPU
39. These are percentages of total CPU time.
40. us: Time spent running non-kernel code. (user time, including nice time)
41. sy: Time spent running kernel code. (system time)
42. id: Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
43. wa: Time spent waiting for IO. Prior to Linux 2.5.41, included in idle.
44. st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.