iowait 이 90% 가 넘는데 도와주세요
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저희 메일시스템은
스팸서버 - 메일서버 - 메일DB 서버로 구성되어 있는데여
메일DB서버의 iowait 때문에 가끔 서비스가 안됩니다.(DB는 mysql 사용)
원인을 찾으려고 하는데 솔라리스처럼 iostat 같은 명령어도 없고
어떻게 해결해야 될까요? 도움될만한 명령어라도 가르쳐주시면
감사하겠습니다
09:10:50 up 4 days, 23:37, 4 users, load average: 55.08, 47.02, 26.74
09:10:55 up 4 days, 23:37, 4 users, load average: 56.44, 47.44, 26.98
09:11:02 up 4 days, 23:37, 4 users, load average: 57.68, 47.85, 27.23
59 processes: 56 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 3.9% 0.0% 2.5% 0.1% 0.7% 92.5% 0.0%
cpu00 4.8% 0.0% 2.3% 0.1% 1.6% 90.9% 0.1%
cpu01 3.3% 0.0% 0.8% 0.0% 0.0% 95.7% 0.0%
cpu02 4.4% 0.0% 5.5% 0.0% 0.1% 89.6% 0.1%
cpu03 3.1% 0.0% 1.3% 0.6% 1.1% 93.7% 0.0%
Mem: 4125448k av, 4098220k used, 27228k free, 0k shrd, 83184k buff
3139976k actv, 773644k in_d, 19876k in_c
Swap: 2096472k av, 303340k used, 1793132k free 3574912k cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
3570 mysql 15 0 298M 268M 2828 S 4.2 6.6 399:12 3 mysqld
11 root 15 0 0 0 0 DW 0.6 0.0 19:02 2 kswapd
1 root 15 0 496 460 440 S 0.0 0.0 0:10 2 init
2 root RT 0 0 0 0 SW 0.0 0.0 0:00 0 migration/0
3 root RT 0 0 0 0 SW 0.0 0.0 0:00 1 migration/1
4 root RT 0 0 0 0 SW 0.0 0.0 0:00 2 migration/2
5 root RT 0 0 0 0 SW 0.0 0.0 0:00 3 migration/3
6 root 15 0 0 0 0 SW 0.0 0.0 1:13 2 keventd
7 root 34 19 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd/0
8 root 34 19 0 0 0 SWN 0.0 0.0 0:00 1 ksoftirqd/1
9 root 34 19 0 0 0 SWN 0.0 0.0 0:00 2 ksoftirqd/2
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