Limit the CPU usage of applications to keep OS functional ?

Hello,
I would first like to say that I am not knowledgeable in programming or in computer science vocabulary. So I will say things as I think they are, sorry about that.
My problem is:
When using any applications, there is always a moment where the application will freeze the computer.
In my understanding, it is because all the CPU is directed towards this application.
So the simple solution that comes with this thinking is: if I limit the CPU an application can use, then I can keep my finder working even if the application crashes.
I understand that I might totally be off-track and in that case, I would love to hear an explanation on how it really works.
Thank you !

Good stuff guys. I guess what I was not considering is that if any archived logs are overwritten, it makes recovery from the last full backup perilous. Here are some more facts about the DB that may help determining the best solution:
All raster content is stored in a raster tablespace. We load raster content (Sat imagery, etc.) from disk or FTP delivery but we do not do any editing to it. So, once it is in Oracle it is static. So, a daily or re-occuring backup of the raster content may not make sense. It may make sense to only back up this tablespace once new loads occur. Also, the raster tablespace makes up over 95% of our DB size (~220GBs).
All other content (mainly geospatial vector information) is stored in 2 other tablespaces and this is the content that is edited routinely and this is the content I need backed up often....and it is small...no more than a few gigs.
So, what if I ran the DB in archive log mode, except for the raster tablespace, and did nightly backups on everything but the raster TS, and backed up the raster TS only when new content is loaded??? Does this seem like a good idea? and if so, what would be the best way to periodically backup a >200GBTS?
This will make redo much MUCH smaller and I can handle removing the archived logs once a backup is complete.
Thanks again. It is fun learning more about this stuff!!
Thanks!
Message was edited by:
[email protected]

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ORA-02393 Exceeded Call Limit on CPU Usage

I have created a Profile and attached it to a user, in this example:
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Limit
CPU_PER_CALL 10
IDLE_TIME 5;
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Exceeded session limit on CPU usage

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Regards,
Rajesh.
Error Text:
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Hi,
Kindly try out the below option from database side.
Error : ORA-02392: exceeded session limit on CPU usage, you are being logged off
Cause : An attempt was made to exceed the maximum CPU usage allowed by the CPU_PER_SESSION clause of the user profile.
Action : If this happens often, ask the database administrator to increase the CPU_PER_SESSION limit of the user profile.
If you looking for solution in MII end,
Check with SAP MII administrator on log files.
Check Data server tab for configuration details. (eg : Pool Size, Pool Max etc)
Kindly let us know the version of SAP MII.
Thanks
Rajesh Sivaprakasam.

Can anybody help me to understand the CPU usage logs

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I try to find the faulty machine in our network, but I don`t understand the logfiles. We have many servers which normally work very fast and reliable.
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It has been only about a month that i bought my macbook pro 15 but it is heating up really fast on the left side even when the cpu usage is only 10%...i'm worried if this is a problem of the hardware.

it has been only about a month that i bought my macbook pro 15 but it is heating up really fast on the left side even when the cpu usage is only 10%...i'm worried if this is a problem of the hardware?

The way something "feels" is very subjective. We would need to know your actual temps. You can install the free iStat Pro widget which is available as a download directly from Apple:
http://www.apple.com/downloads/dashboard/status/istatpro.html
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Getting the CPU USAGE

hi !
I want to get the CPU USAGE of the entire system.Is there any command in JAVA to get this.
I don't want the CPU USAGE of a particular process but I want the CPU USAGE of the whole system.
Kindly reply if any one knows it.
Bye
Srinu.

Take a look at...
http://www.javaworld.com/javaworld/javaqa/2002-11/01-qa-1108-cpu.html?
N35Sy

NI HyperTrend Control raises the CPU usage of NI Citadel DB and freezes it.

When a VI uses NI HyperTrend Control to fetch data from NI Citadel DB, the CPU usage of citadel is raised up to 10% and stops working.
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How can the control be prevented from freezing citadel?

Jeff.St wrote:
Hey iCat,
Does the Trace View in MAX work?
What version of LabVIEW are you running?
Can you run the Hyper Trend control without linking it to a particular trace?
Can you use the Hyper Trend control without starting your VI?
Best,
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yes with 3 signals(traces?)
2) What version of LabVIEW are you running?
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Please refer to the attached image.
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He wants to put it in Y-axis via a property node in the block diagram.
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Attachments:
hypertrendcontrol.png ‏46 KB

Why is the CPU usage different ? I used LOAD_BALANCE option.

I used a oracle 11.2.0.2 in RAC 2 nodes.
And I used LOAD_BALANCE option in the WAS pool configuration
jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.10.118)(PORT=1522))(*LOAD_BALANCE=YES*)(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=NOFFICE)))
But the CPU usage is different between two system. Usually it is 6:4, Sometimes it is 7:3.
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I want to a balance in CPU Usage (5:5).
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You are partially correct which is another way of saying you are incorrect too.
There are two types of load balancing ... server side and client side. There are also questions with respect to how the client is connecting, we don't know, whether the session load is identical, etc. which the OP has not stated.
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[svn:fx-trunk] 7830: Update ASDoc on the new backgroundFrameRate property to WindowedApplication , to by default reduce the CPU usage in cases where an app is not 'active'.

Revision: 7830
Author:   [email protected]
Date:     2009-06-14 15:57:29 -0700 (Sun, 14 Jun 2009)
Log Message:
Update ASDoc on the new backgroundFrameRate property to WindowedApplication, to by default reduce the CPU usage in cases where an app is not 'active'.
Bugs: SDK-21135
Reviewer:
QE Notes:
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-21135
Modified Paths:
    flex/sdk/trunk/frameworks/projects/airframework/src/mx/core/WindowedApplication.as
    flex/sdk/trunk/frameworks/projects/airframework/src/spark/components/WindowedApplication. as

By the way, I agree with sybrand: you need to tune
your redo log size.
Regards
Ignacio
http://oracledisect.blogspot.com
Ignacio,
The excessive waits on log file parallel write and the related client wait of log file sync may be due to insufficient CPU availability, and may not point at an actual redo log size problem or a problem with the disk speed where the redo is written to disk, especially if there are 3 Oracle instances on the server with a single CPU.
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http://kevinclosson.wordpress.com/2007/07/21/manly-men-only-use-solid-state-disk-for-redo-logging-lgwr-io-is-simple-but-not-lgwr-processing/
"Once LGWR loses his CPU it may be quite some time until he gets it back. For instance, if LGWR is preempted in the middle of trying to perform a redo buffer flush, there may be several time slices of execution for other processes before LGWR gets back on CPU..." Fix the CPU problem, and the other significant waits may decrease.
JesusLuvR,
yingkuan's suggestion to look at the SQL statement that performs the 4,365,564 logical IOs, consumes 186.03 CPU seconds, and has an execution time of 225.06 seconds, is likely a very good starting point. You might also want to check the value of the SESSION_CACHED_CURSORS parameter to see if it needs to be adjusted.
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

[svn:fx-trunk] 7753: Adding backgroundFrameRate property to WindowedApplication, to by default reduce the CPU usage in cases where an app is not 'active'.

Revision: 7753
Author:   [email protected]
Date:     2009-06-11 12:29:44 -0700 (Thu, 11 Jun 2009)
Log Message:
Adding backgroundFrameRate property to WindowedApplication, to by default reduce the CPU usage in cases where an app is not 'active'.
Bugs: SDK-21135
Reviewer: Ryan, Darrell
QE Notes: Test needs to be written for this new API. PARB has tentatively approved, will update spec here: http://opensource.adobe.com/wiki/display/flexsdk/Spark+WindowedApplication
Doc Notes: Needs to be documented and ASDoc scrubbed.
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-21135
Modified Paths:
    flex/sdk/trunk/frameworks/projects/airframework/src/mx/core/WindowedApplication.as
    flex/sdk/trunk/frameworks/projects/airframework/src/spark/components/WindowedApplication. as

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ORA-02393: exceeded call limit on CPU usage -- Concept Understanding is req

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How do you get the CPU Usage in Linux

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http://www.javaworld.com/javaworld/javaqa/2002-11/01-qa-1108-cpu.html
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#include <sys/time.h>
#include "CPU.h"
#include "jawt_md.h"
#include "jawt.h"
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Any Ideas?

In Linux, you can read /proc/uptime. It does NOT give you the load averages that the command uptime gives. It gives you numerically the amount of time the CPU was idle vs how much time it was spent doing something. You need to read these two floating point numbers one every second, or once every 5 or 10 seconds then do the delta on the change: The maths are as follows:
Read the file in twice in 5 seconds, parse into two floats/doubles:
double[] last; // the first read of the file
double[] rect; // the latest read of the file
double ld = last[1] - last[0];
double rd = rect[1] - rect[0];
double cpu = (1.0d-(rd/ld)) * 100.0d;This should print the CPU percentage in Linux for that given time frame (5 second updates).

Where is the cpu usage monitor in LPX?

Hi everyone,
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Hey there you need to customise (change mode) the Control Bar and Display by right clicking on the icon on the far left of the LCD display.
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*[[Troubleshoot Firefox issues using Safe Mode]]

Limit the CPU usage of applications to keep OS functional ?

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