MPSTAT
is another command which helps in analyzing the linux system and also
in troubleshooting various CPU. mpstat mainly focus on the CPU.It
provides various usu full information regarding the CPU.
The
Main benefit with mpstat is it provides information per processor
basics.
Basic
Example
Dev:vx1379:djbs002-~
$ mpstat
Linux
2.6.18-348.el5xen (vx1379) 09/01/2013
|
10:58:49
PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s |
|
10:58:49
PM all 6.00 0.14 0.22 0.64 0.00 0.02 0.11 92.86 209.70 |
The
columns give various level of information like
where
CPU - Processor number.the “all” under it indicated that
statistics are calculated as averages among all processors.
%user
- Show the percentage of CPU utilization that occurred while
executing at the user level (application).
%nice
- Show the percentage of CPU utilization that occurred while
executing at the user level with nice priority.
%sys
- Show the percentage of CPU utilization that occurred while
executing at the system level
(kernel). Note that this
does not include time spent servicing interrupts or softirqs.
%iowait
- Show the percentage of time that the CPU or CPUs were idle during
which the system had an outstanding disk I/O request.
%irq
- Show the percentage of time spent by the CPU or CPUs to service
interrupts.
%soft
- Show the percentage of time spent by the CPU or CPUs to service
softirqs. A softirq (software interrupt) is one of up to 32
enumerated software interrupts which can run on multiple CPUs at
once.
%steal
- Show the percentage of time spent in involuntary wait by the
virtual CPU or CPUs while the hypervisor was servicing another
virtual processor.
%idle
- Show the percentage of time that the CPU or CPUs were idle and the
system did not have an outstanding disk I/O request.
intr/s
- Show the total number of interrupts received per second by the CPU
or CPUs.
More
To Come, Happy Learning :-)
