나는 iotop을 사용하는데 이것이 내가 얻는 것입니다
Total DISK READ : 0.00 B/s | Total DISK WRITE : 15.78 M/s
Actual DISK READ: 19.08 K/s | Actual DISK WRITE: 0.00 B/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
16583 be/4 nobody 0.00 B/s 3.82 K/s 0.00 % 0.00 % httpd -k start
16850 be/4 mysql 0.00 B/s 7.04 M/s 0.00 % 0.00 % mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --lo~te.com.err --open-files-limit=10000 --pid-file=/var/lib/mysql/host.hostgreatsite.com.pid
16317 be/4 nobody 0.00 B/s 3.82 K/s 0.00 % 0.00 % httpd -k start
16859 be/4 mysql 0.00 B/s 3.04 M/s 0.00 % 0.00 % mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --lo~te.com.err --open-files-limit=10000 --pid-file=/var/lib/mysql/host.hostgreatsite.com.pid
1024 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % NetworkManager --no-daemon [gdbus]
1 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % systemd --switched-root --system --deserialize 21
2 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kthreadd]
3 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [ksoftirqd/0]
5124 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/u12:0]
5 be/0 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/0:0H]
518 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % abrt-watch-log -F BUG: WARNING: at WARNING: CPU: INFO: possible recursive locking detect~ption: simd exception: iret exception: /var/log/messages -- /usr/bin/abrt-dump-oops -xtD
7 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/0]
8 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcu_bh]
9 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/0]
10 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/1]
11 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/2]
12 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/3]
13 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/4]
14 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuob/5]
15 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcu_sched]
16 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/0]
17 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/1]
18 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/2]
19 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/3]
20 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/4]
21 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [rcuos/5]
22 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/0]
23 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/1]
24 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/1]
25 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [ksoftirqd/1]
15898 be/4 nobody 0.00 B/s 0.00 B/s 0.00 % 0.00 % httpd -k start
27 be/0 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/1:0H]
28 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/2]
29 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/2]
30 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [ksoftirqd/2]
517 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % abrtd -d -s
32 be/0 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/2:0H]
33 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/3]
34 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/3]
35 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [ksoftirqd/3]
16420 be/4 nobody 0.00 B/s 0.00 B/s 0.00 % 0.00 % httpd -k start
37 be/0 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/3:0H]
38 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/4]
39 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/4]
40 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [ksoftirqd/4]
42 be/0 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [kworker/4:0H]
43 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [watchdog/5]
44 rt/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [migration/5]
mysql 문제인거 같습니다.
root@host [~]# iostat -xk 5
2016년 12월 5일 _x86_64_ (6 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
35.35 0.05 8.48 6.11 0.17 49.84
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvdap1 0.26 9.95 24.20 33.63 480.30 1125.98 55.55 7.50 129.63 102.41 149.22 5.55 32.08
xvdap2 0.21 0.83 0.04 0.21 0.99 4.18 41.88 0.00 18.50 10.36 19.88 3.67 0.09
xvdap3 0.16 21.65 16.33 19.33 90.31 230.11 17.97 0.57 15.87 10.18 20.68 1.63 5.82
xvdap4 0.01 0.06 1.26 0.13 15.21 3.25 26.67 0.03 20.28 17.04 52.31 3.19 0.44
avg-cpu: %user %nice %system %iowait %steal %idle
69.67 0.00 14.01 2.17 0.27 13.88
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvdap1 0.00 11.40 10.40 39.80 56.80 1005.60 42.33 4.84 96.41 47.13 109.28 4.16 20.86
xvdap2 0.00 3.60 0.00 2.20 0.00 23.20 21.09 0.01 2.27 0.00 2.27 1.73 0.38
xvdap3 0.00 0.00 0.60 0.00 2.40 0.00 8.00 0.00 0.67 0.67 0.00 0.67 0.04
xvdap4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
avg-cpu: %user %nice %system %iowait %steal %idle
60.56 0.00 13.50 1.07 0.23 24.63
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
xvdap1 0.00 10.60 1.00 147.80 8.80 6284.00 84.58 10.33 69.45 6.40 69.88 0.67 9.96
xvdap2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
xvdap3 0.00 0.00 1.00 0.00 32.80 0.00 65.60 0.02 15.80 15.80 0.00 5.00 0.50
xvdap4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
이는 첫 번째 드라이브인 xvdap1에만 로드가 많이 있음을 보여줍니다.
이것이 올바른 결론인가?