AIX CPU performance script ? Post: 302727951

Sponsored Content

Top Forums Shell Programming and Scripting AIX CPU performance script ? Post 302727951 by bakunin on Wednesday 7th of November 2012 06:14:17 AM

11-07-2012

Registered User

Are you sure you know what you want to measure at all?

"CPU utilization" and "memory utilization" is about as significant as the football results plus the lottery numbers of last week - summed up to a single number. You need the details and you need to define what you want to know before you even start to monitor. Otherwise you only get a bunch of meaningless numbers.

There is no such thing as a single number to describe any of the above, like there is no single number to describe the weather. There is temperature, air pressure, humidity, wind velocity, etc., but if you add all that up and arrive at "3156" would you know from this number what the weather is like? Perhaps not.

For CPU utilization, depending on what you want to know, the numbers of interest might be: the % of the time the CPU spends working on system calls, user programs, experiencing I/O-wait or idle times, further the percentage of "entitled capacity consumed" (the number of processor resources available to the LPAR versus the number of used real processor time) and maybe some numbers of minor significance too.

For memory utilization this might be: swap file utilization, size of computational memory, number of revolutions of the clock hand, number of pages scanned, file cache hit/miss ratio, size of file cache, some I/O-related numbers in "vmstat -v" and perhaps some other numbers, depending on what your system does and what is likely to be a bottleneck.

Btw.:

Quote:

Originally Posted by vegasluxor

I added below entries in the cron

Code:

0 8-17 * * 1-5 /usr/lib/sa/sa1 1200 3 &
5 18 * * 1-5 /usr/lib/sa/sa2 -s 8:00 -e 18:01 -i 3600 -ubcwyaqvm &

But not found any output in /usr/adm/sa folder.

This is probably because you used cron to start background processes. They are probably still running. Remove the trailing "&" and redirect any possible output.

I hope this helps.

bakunin

bakunin

View Public Profile for bakunin

Find all posts by bakunin

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

AIX performance

Hiya all, I am a newbie sysadmin to AIX, i have worked on HPUX for 3 years. I have started a new role with in an IBM house and because there is me and one other there are a couple of issues I cannot work out: We havehad a production server slowing down processing batch jbs over the past...

2. AIX

Performance Problem - High CPU utilization

Hello everybody. I have a problem with my AIX 5.3. Recently my unix shows a high cpu utilization with sar or topas. I need to find what I have to do to solve this problem, in fact, I don't know what is my problem. I had the same problem with another AIX 5.3 running the same...

3. AIX

Performance issue in AIX 5.3

Is there is any way to increase the CPU utilization of a Embedded SQL program in AIX 5.3 .. for performance purpose.

4. Solaris

In Solaris Zones Dedicated-Cpu Performance?

Hi All, While creating zone we will mention min and max cpu cores, like add dedicated-cpu set ncpus=NUM_CPUS_MIN-NUM_CPUS_MAX end Ques1: Suppose thing that non global zone uses only minimum cores at particular time What the other cores will do, Will it shared to global zone? Ques:2...

5. HP-UX

Bad performance but Low CPU loading?

There might be some problem with my server, because every morning at 7, it's performance become bad with no DB extra deadlock. But I just couldn't figure it out. Please give me some advise, thanks a lot... According to the CPU performace chart, Daily CPU loading Maximum: 42 %, Average:36%. ...

6. SCO

CPU Performance Problems on VMWARE

hi We have migrated SCO 5.0.6 into ESX4, but the VM eats 100% of the virtual CPU. Here is top print from the SCO VM: last pid: 16773; load averages: 1.68, 1.25, 0.98 02:08:41 79 processes: 75 sleeping, 2 running, 1 zombie, 1 onproc CPU states: 0.0% idle, 17.0% user,...

7. HP-UX

Performance - CPU spiking

We have a DB server which is constantly utilised above 95% above. This is becoming nuisance when the monitoring team frequently calls to check on it. Frankly I do not know what to tweak or even interpret the outputs. I noticed constant 30 to 60% in wio column of the cpu utilisation. There...

8. Solaris

Understanding & Monitoring CPU performance (Load vs SAR)

Hi all, Been reading a lot of the cpu load and its "analogy of it to car traffic path of expressway" From wiki Most UNIX systems count only processes in the running (on CPU) or runnable (waiting for CPU) states. However, Linux also includes processes in uninterruptible sleep states...

9. AIX

CPU performance

In my oracle db server we have 15 cores (power8). The output of the vmstat is as below. System configuration: lcpu=128 mem=208800MB ent=16.00 kthr memory page faults cpu time -----------...

LEARN ABOUT HPUX

dlpi_max_ub_promisc

dlpi_max_ub_promisc(5)						File Formats Manual					    dlpi_max_ub_promisc(5)

NAME

       dlpi_max_ub_promisc - maximum number of unbound promiscuous streams allowed on a LAN interface

VALUES

   Failsafe
   Default
   Allowed values
       or

   Recommended values
DESCRIPTION

       The  tunable  is  used  to  dynamically	increase or decrease the maximum number of unbound promiscuous streams that can be opened on a LAN
       interface.

       Enabling multiple unbound promiscuous streams may cause CPU utilization to increase up to three times as compared to CPU  utilization  with
       no unbound promiscuous streams.	Increasing the value of this tunable does not by itself degrade networking or kernel performance.

   Who Is Expected to Change This Tunable?
       Privileged user.

   Restrictions on Changing
       Changes	to this tunable take effect immediately.  When value is reduced from a higher value to a lower value, the existing unbound promis-
       cuous streams will not be stopped to accommodate the change.  However, this tunable will limit the  new	unbound  streams  created  on  the
       interface.

   When Should the Value of This Tunable Be Raised?
       This tunable should be raised when the number of unbound promiscuous applications needs to be more than the default value.

   What Are the Side Effects of Raising the Value?
       Side effect may be an increase in CPU utilization.

WARNINGS

       All  HP-UX kernel tunable parameters are release specific.  This parameter may be removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

SEE ALSO

       kctune(1M), lanadmin(1M), gettune(2), settune(2), lan(7).

       DLPI Programmer's Guide on

							     Tunable Kernel Parameters					    dlpi_max_ub_promisc(5)