Determine threshold for CPU Post: 302993946

Sponsored Content

Operating Systems AIX Determine threshold for CPU Post 302993946 by MadeInGermany on Thursday 16th of March 2017 02:37:16 PM

03-16-2017

Registered User

vmstat measures a certain interval, then you get the average CPU usage from that interval.
That means your check must wait until the interval is finished.
For example

Code:

vmstat 5 2

The second value line is the average from the 5 seconds interval.
(The first value line is the average since the system was booted - not very useful.)
"Normal" thresholds for usr%,system%,iowait% are 75,55,30 for warning and 90,70,40 for critical.
Another measurement is the loadavg, this is the runqueue length. The runqueue gets longer if the scheduler is too busy to run the task according to the schedule.
The advantage of the loadavg is that the system provides the measurement interval; there are even 3 intervals: 1 minute, 5 minutes, 15 minutes.
The command line tool for this is uptime.
In the "infrastructure monitoring" sub-forum I have provided some Nagios-plugin-scripts that work on many platforms. Even if you do not have Nagios, you can see the commands in the code. Actually the check_load5.sh uses uptime and the check_cpu_stats.sh uses vmstat.

MadeInGermany

View Public Profile for MadeInGermany

Find all posts by MadeInGermany

9 More Discussions You Might Find Interesting

1. HP-UX

How to determine cpu&memory percentage usage per user

Using HP-UX v11 Need to monitor cpu and memory usage, total for system and separately for each user in command-line mode. Found out next ways to monitor total cpu usage under hp-ux: 1) vmstat, also shows free memory 2) sar -M ps -eo user,pcpu - does not work, means 'user-defined format'...

2. Shell Programming and Scripting

apache threshold

Hi folks, how can i check apache threshold values via shell scripting and what factors need to check via shell scripting process or number of users or what. pls do advice me. Thanks, Bash

3. UNIX for Dummies Questions & Answers

how to get persistant cpu utilization values per process per cpu in linux (! top,ps)

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...

4. Solaris

Multi CPU Solaris system shows 100% CPU usage.

Hello Friends, On one of my Solaris 10 box, CPU usage shows 100% using "sar", "vmstat". However, it has 4 CPUs and prstat and glance are not showing enough processes to justify high CPU utilization. ========================================================================= $ prstat -a ...

5. HP-UX

how could I use shell script to determine which CPU structure

how could I use shell script to determine which CPU structure because I found that I compile my program under Itanium base that cannot run on the PA-RISC base but PA-RISC program can run on Itanium base i would like to use shell script to know which CPU structure it is,how could i do thanks

6. Solaris

How to change CPU threshold high temperature

Hi, I have a NETRA 240 server wich should work on high temperature environment (up to 50 deg celsius). After reaching ~48 deg, the system is shuting down. The HighShutDownThreshold of the CPU is set to 89 deg The PowerOffThreshold of the CPU is set to 96 deg Please help me to change these...

7. UNIX for Dummies Questions & Answers

threshold

Hi, I have a table with 14 columns. How can I filter the columns 2-14, so that I get only those rows back in which the data values are >= 6 in 5 or more columns. :confused: E.g. A 6 6 3 6 7 8 B 1 2 3 4 5 5 C 2 2 2 6 7 8 Here I should only get back the row A. I would like to work from...

8. Solaris

Rootvol above threshold

Hi there, Root filesystem is above threshold, I have search and cleared unwanted files which are filling up space. But the root fs is still above threshold. I don't know about veritas volume management. Can anyone show me how to solve this. Du shows /proc is occupying a lot of space. Most of the...

9. UNIX for Dummies Questions & Answers

Is it possible to combine multiple CPU to act as a single CPU on the same server?

We have a single threaded application which is restricted by CPU usage even though there are multiple CPUs on the server, hence leading to significant performance issues. Is it possible to merge / combine multiple CPUs at OS level so it appear as a single CPU for the application?

LEARN ABOUT OPENSOLARIS

uptime

uptime(1)							   User Commands							 uptime(1)

NAME

       uptime - show how long the system has been up

SYNOPSIS

       uptime

DESCRIPTION

       The uptime command prints the current time, the length of time the system has been up, and the average number of jobs in the run queue over
       the last 1, 5 and 15 minutes. It is, essentially,  the first line of a w(1) command.

EXAMPLES

       Below is an example of the output uptime provides:

	 example% uptime
	 10:47am  up 27 day(s), 50 mins,  1 user,  load average: 0.18, 0.26, 0.20

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |Availability		      SUNWcsu			   |
       +-----------------------------------------------------------+

SEE ALSO

       w(1), who(1), whodo(1M), attributes(5)

NOTES

       who -b gives the time the system was last booted.

SunOS 5.11							    18 Mar 1994 							 uptime(1)