What is MPSTAT???

This command use for Linux Performance Monitoring purpose.
mpstat is Linux command,Its use for  reports processors statistics.

1. mpstat – Display basic info

By default mpstat displays CPU statistics as shown below.

$ mpstat
Linux 2.6.32-100.28.5.el6.x86_64 (dev-db)       07/09/2011

10:25:32 PM  CPU   %user   %nice    %sys %iowait    %irq   %soft  %steal   %idle    intr/s
10:25:32 PM  all    5.68    0.00    0.49    2.03    0.01    0.02    0.00   91.77    146.55

2. mpstat – Display all information

Option -A, displays all the information that can be displayed by the mpstat command as shown below. This is really equalivalent to “mpstat -I ALL -u -P ALL” command.

$ mpstat -A
Linux 2.6.32-100.28.5.el6.x86_64 (dev-db)       07/09/2011      _x86_64_        (4 CPU)

10:26:34 PM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
10:26:34 PM  all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00   99.99
10:26:34 PM    0    0.01    0.00    0.01    0.01    0.00    0.00    0.00    0.00   99.98
10:26:34 PM    1    0.00    0.00    0.01    0.00    0.00    0.00    0.00    0.00   99.98
10:26:34 PM    2    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
10:26:34 PM    3    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00

10:26:34 PM  CPU    intr/s
10:26:34 PM  all     36.51
10:26:34 PM    0      0.00
10:26:34 PM    1      0.00
10:26:34 PM    2      0.04
10:26:34 PM    3      0.00

10:26:34 PM  CPU     0/s     1/s     8/s     9/s    12/s    14/s    15/s    16/s    19/s    20/s    21/s    33/s   NMI/s   LOC/s   SPU/s   PMI/s   PND/s   RES/s   CAL/s   TLB/s   TRM/s   THR/s   MCE/s   MCP/s   ERR/s   MIS/s
10:26:34 PM    0    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    7.47    0.00    0.00    0.00    0.00    0.02    0.00    0.00    0.00    0.00    0.00    0.00    0.00
10:26:34 PM    1    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    4.90    0.00    0.00    0.00    0.00    0.03    0.00    0.00    0.00    0.00    0.00    0.00    0.00
10:26:34 PM    2    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.04    0.00    0.00    0.00    0.00    0.00    3.32    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00
10:26:34 PM    3    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    4.17    0.00    0.00    0.00    0.00    0.01    0.00    0.00    0.00    0.00    0.00    0.00    0.00

3. mpstat – Display CPU statistics of individual CPU (or) Core

Option -P ALL, displays all the individual CPUs (or Cores) along with its statistics as shown below.

$ mpstat -P ALL
Linux 2.6.32-100.28.5.el6.x86_64 (dev-db)       07/09/2011      _x86_64_        (4 CPU)

10:28:04 PM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
10:28:04 PM  all    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00   99.99
10:28:04 PM    0    0.01    0.00    0.01    0.01    0.00    0.00    0.00    0.00   99.98
10:28:04 PM    1    0.00    0.00    0.01    0.00    0.00    0.00    0.00    0.00   99.98
10:28:04 PM    2    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00
10:28:04 PM    3    0.00    0.00    0.00    0.00    0.00    0.00    0.00    0.00  100.00

To display statistics information of a particular CPU (or core), use option -P as shown below.

$ mpstat -P 0
Linux 2.6.32-100.28.5.el6.x86_64 (dev-db)       07/09/2011      _x86_64_        (8 CPU)

10:28:53 PM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
10:28:53 PM    0    0.01    0.00    0.01    0.01    0.00    0.00    0.00    0.00   99.98

$ mpstat -P 1 

 Linux 2.6.32-100.28.5.el6.x86_64 (dev-db)       07/09/2011      _x86_64_        (8 CPU)

10:28:55 PM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle
10:28:55 PM    1    0.00    0.00    0.01    0.00    0.00    0.00    0.00    0.00   99.98

Finally, as we mentioned earlier mpstat is part of the sysstat package. When you do mpstat -V, it will really display the version number of the systat package as shown below.

$ mpstat -V
sysstat version 9.0.4
(C) Sebastien Godard (sysstat  orange.fr)