But on a virtualized system, at least on POWER, user/sys/idle/wait are all relative to the column "pc" and/or "ec" when using shared processors.
On a system (this one idle) with a dedicated processor(s) the values you see for cpu consumption can be used in the "normal" way.
However, when using shared processors, if your (summed) entitlement - which is what vmstat is showing (use mpstat or sar for a per logical processor breakdown - and total at the end) AND the summed entitlement is less than 100% you have at least the rest of your entitlement for additional processing.
While the number is less than entitlement AND user+sys is near 95% or higher, what this says is WHEN active, the processor is doing "user or sys" activities - "idle" time is being given back to the hypervisor for other activities.
The same "user+sys" times when above entitlement could be a problem if the app number is getting very small (my system only has 1 cpu, so it is always small - )
Hi, iam new to AIX and had a basic question.
I was asked to give a chart of CPU utilization in percentage for every hour.
where can i look for information and which column should i look at?
I would be very thankful if somebody could respond.
Thanks!
karthik (1 Reply)
Dear friends,
I am doing a report daily for all most 30 more serves... i need to check out CPU utlization bu (top command, 100 - (ideal value))
and Memory utilization too
could some one help me how can i get it directly, if scripts also no problem..
i will very thankful if some one... (3 Replies)
Hi to All,
Would you please help me.
I would like to know, In Unix How to know CPU utilization for every process.
Thanks in Advance.
Thanks,
Divyang (3 Replies)
hi,
i want to know cpu utilizatiion per process per cpu..for single processor also if multicore in linux ..to use these values in shell script to kill processes exceeding cpu utilization.ps (pcpu) command does not give exact values..top does not give persistant values..psstat,vmstat..does njot... (3 Replies)
Hello,
We just purchased two new 4-way (one active one failover) 5Ghz Power6 Servers (failover) with 64GB RAM (32GB per node) runing AIX 6.1 with two LPARs per node connected to our SAN with two 4GB HBAs. The PROD LPAR has 2 dedicated CPUs (4 virtual) and the TEST LPAR has 2 dedicated CPUs.
... (3 Replies)
I know how to check the CPU utilization and memory space
like:
vmstat
top
free
What i want ot check on my linux system is...
how much CPU are available on my system and do i need to put extra CPU.
Also need to check the hardware configuration and the space related to the same
... (3 Replies)
Could you please explain about calculate CPU utilization of aix server using lparstat command?
Here below i have provided example output from aix test server.
System configuration: type=Shared mode=Uncapped smt=On lcpu=4 mem=4096 psize=63 ent=0.50
%user %sys %wait %idle physc %entc ... (1 Reply)
i am using the below command in order to find the cpu utilization by a user..now i want to mail if the cpu utilization goes beyond 5%....can someone please help me ?
ps auxw | sort -r +2 | awk '{ print $3,$1 }' | head -6 | egrep "USER|#anonymous#"
%CPU USER
2.0 anonymous
Regards,... (6 Replies)
Hi,
i am new to linux/RHEL 6.0 and i have two questions.
1) How to get the CPU utilization and Memory Utilization of all Services running currently?
2) How to get the CPU utilization and Memory Utilization of all Applications running currently?
Please help me to find the script.
... (2 Replies)
Discussion started by: nossam
2 Replies
LEARN ABOUT OPENDARWIN
mpstat
MPSTAT(1) Linux User's Manual MPSTAT(1)NAME
mpstat - Report processors related statistics.
SYNOPSIS
mpstat [ -A ] [ -I { SUM | CPU | SCPU | ALL } ] [ -u ] [ -P { cpu [,...] | ON | ALL } ] [ -V ] [ interval [ count ] ]
DESCRIPTION
The mpstat command writes to standard output activities for each available processor, processor 0 being the first one. Global average
activities among all processors are also reported. The mpstat command can be used both on SMP and UP machines, but in the latter, only
global average activities will be printed. If no activity has been selected, then the default report is the CPU utilization report.
The interval parameter specifies the amount of time in seconds between each report. A value of 0 (or no parameters at all) indicates that
processors statistics are to be reported for the time since system startup (boot). The count parameter can be specified in conjunction
with the interval parameter if this one is not set to zero. The value of count determines the number of reports generated at interval sec-
onds apart. If the interval parameter is specified without the count parameter, the mpstat command generates reports continuously.
OPTIONS -A This option is equivalent to specifying -I ALL -u -P ALL
-I { SUM | CPU | SCPU | ALL }
Report interrupts statistics.
With the SUM keyword, the mpstat command reports the total number of interrupts per processor. The following values are displayed:
CPU
Processor number. The keyword all indicates that statistics are calculated as averages among all processors.
intr/s
Show the total number of interrupts received per second by the CPU or CPUs.
With the CPU keyword, the number of each individual interrupt received per second by the CPU or CPUs is displayed.
With the SCPU keyword, the number of each individual software interrupt received per second by the CPU or CPUs is displayed. This
option works only with kernels 2.6.31 and later.
The ALL keyword is equivalent to specifying all the keywords above and therefore all the interrupts statistics are displayed.
-P { cpu [,...] | ON | ALL }
Indicate the processor number for which statistics are to be reported. cpu is the processor number. Note that processor 0 is the
first processor. The ON keyword indicates that statistics are to be reported for every online processor, whereas the ALL keyword
indicates that statistics are to be reported for all processors.
-u Report CPU utilization. The following values are displayed:
CPU
Processor number. The keyword all indicates that statistics are calculated as averages among all processors.
%usr
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 hardware and software interrupts.
%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 hardware interrupts.
%soft
Show the percentage of time spent by the CPU or CPUs to service software interrupts.
%steal
Show the percentage of time spent in involuntary wait by the virtual CPU or CPUs while the hypervisor was servicing another
virtual processor.
%guest
Show the percentage of time spent by the CPU or CPUs to run a 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.
Note: On SMP machines a processor that does not have any activity at all is a disabled (offline) processor.
-V Print version number then exit.
ENVIRONMENT
The mpstat command takes into account the following environment variable:
S_TIME_FORMAT
If this variable exists and its value is ISO then the current locale will be ignored when printing the date in the report header.
The mpstat command will use the ISO 8601 format (YYYY-MM-DD) instead.
EXAMPLES
mpstat 2 5
Display five reports of global statistics among all processors at two second intervals.
mpstat -P ALL 2 5
Display five reports of statistics for all processors at two second intervals.
BUGS
/proc filesystem must be mounted for the mpstat command to work.
Only a few activities are given by the Linux kernel for each processor.
FILES
/proc contains various files with system statistics.
AUTHOR
Sebastien Godard (sysstat <at> orange.fr)
SEE ALSO sar(1), pidstat(1), iostat(1), vmstat(8)
http://pagesperso-orange.fr/sebastien.godard/
Linux AUGUST 2011 MPSTAT(1)