Analysis of linux Operating Performance

1. Analysis of cpu load

Mpstat-P ALL

Linux 3.11.0-rc3 08/13/2013 _ i686 _ (4 CPU)

At 02:41:45 CPU % usr % nice % sys % iowait % irq % soft % steal % guest % idle
02:41:45 all 4.17 0.00 1.67 1.65 0.00 0.01 0.00 0.00 92.49
02:41:45 PM 0 4.27 0.00 2.53 2.72 0.00 0.03 0.00 0.00 90.45
02:41:45 pm 1 4.30 0.00 1.25 1.15 0.00 0.01 0.00 0.00 93.29
02:41:45 PM 2 4.25 0.00 1.70 1.61 0.00 0.00 0.00 0.00 92.43
02:41:45 PM 3 3.88 0.00 1.21 1.12 0.00 0.00 0.00 0.00 93.78

The result is similar to that on top. It mainly depends on whether each CPU is balanced and which type occupies more CPU.

2. View Io read/write with iostat

Linux 3.11.0-RC3 08/13/2013 _ i686 _ (4 CPU)

Avg-cpu: % user % nice % system % iowait % steal % idle
4.06 0.00 1.66 1.49 0.00 92.79

Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
Sda 7.96 146.83 105.66 3458161 2488524
Dm-0 6.37 99.75 74.57 2349414 1756256
Dm-1 0.16 0.05 0.59 1260 13912
Dm-2 3.00 84.72 40.27 1995329 948588
Dm-3 2.97 14.95 33.70 352201 793756

In this way, you can see which disk has more reads and writes.

3. View network traffic

Sar-N Dev 1 20

Linux 3.11.0-RC3 08/13/2013 _ i686 _ (4 CPU)

03:35:41 iface rxpck/s txpck/s rxkb/s txkb/s rxcmp/s txcmp/s rxmcst/s
03:35:42 lo 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:35:42 PM virbr0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
03:35:42 eth0 4.00 5.00 0.54 1.94 0.00 0.00 0.00

The sending and receiving information of the specific network port.