Linux Daily Management 1

[Email protected] ~]# W

17:52:51 up 2 days, 1:23, 1 user, Load average:0.00, 0.00, 0.00

Time runs for several hours a few users 1 minutes load 5 minutes load 15 min load

USER TTY from [email protected] IDLE jcpu PCPU

Root pts/0 192.168.100.5 17:50 1.00s 0.86s 0.67s W

Explanation of the load 1/5/15 minutes There are several processes using the CPU

[Email protected] ~]# uptime

18:08:00 up 2 days, 1:38, 1 user, Load average:0.00, 0.00, 0.00

[Email protected] ~]# Cat/proc/cpuinfo

Processor: 0

vendor_id: Genuineintel

CPU Family: 6

Model: 42

Model name: Intel (R) Core (TM) i5-2450m CPU @ 2.50GHz

Stepping: 7

CPU MHz: 2494.389

Cache size: 3072 KB

Fdiv_bug: No

Hlt_bug: No

F00f_bug: No

Coma_bug: No

FPU: Yes

Top

TOP-BN1 Static Display

[Email protected] ~]# Vmstat

procs-----------Memory-------------Swap-------io------System-------CPU-----

Idle write disk cache in interchange

Running a blocking buffer

R b swpd free buff cache si so bi bo in CS us sy ID WA St

0 0 0 108040 119152 682536 0 0 4 4 13 13 0 0 100 0 0

Vmstat 1 shows once every second

Vmstat 1 10 Display once every second, 10 times in total

Iotop

[Email protected] ~]# Iotop

Total DISK read:0.00 b/S | Total DISK write:0.00 b/S

TID PRIO USER disk READ disk WRITE swapin io> COMMAND

1 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% Init

2 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [Kthreadd]

3 RT/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [migration/0]

4 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [ksoftirqd/0]

5 RT/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [migration/0]

6 RT/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [watchdog/0]

7 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [events/0]

8 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [Cgroup]

9 BE/4 root 0.00 b/S 0.00 B/s 0.00% 0.00% [Khelper]

Iostat

[Email protected] ~]# Iostat

Linux 2.6.32-431.el6.i686 (Bogon) January 05, 2017 _i686_(1 CPU)

AVG-CPU:%user%nice%system%iowait%steal%idle

0.03 0.02 0.11 0.17 0.00 99.67

Device:tps blk_read/s blk_wrtn/s Blk_read Blk_wrtn

SDA 0.41 8.35 8.57 1527132 1567892

SCD0 0.00 0.00 0.00 400 0

Sar-n DEV 1 10 shows 10 network card traffic

Sar-b 1 10 View disk IO

Sar-q-f/var/log/sa/sa04 View Log number 4th

Ps-eo PID,GRGS,PSR See which process is running on which CPU

Linux Daily Management 1