Cpu 100%, cpu 100%
this is crazy everytime i turn on itunes it uses 100% of my cpu it will not allow me to back up or sync anything please help
OK, I have been to **** and back since updating iTunes to version 10.5.3.3. Basically it hogs 100% of your CPU. I read all the articles and forums I could find and tried out everything including Win socket resets, re-installations etc. Nothing worked. My objective is purely to get iTunes in any version format to work so I can use iTunes again.
I am now smiling and using iTunes. This is what I did.
SYSTEM RESTORE POINT
As always, create a system restore point so you have something to restore to in case something goes wrong
UNINSTALL PROPERLY
Go to control panel, programs and uninstall the below Apple related applications
iTunes
Quicktime
Apple Software Update
Apple Mobile Support
Bonjour
Apple Application Support
iPhone
any other Apple related product you can find
Delete or move any *.itl files (iTunes databases)
You need to remove these as when you install an earlier version of iTunes it will not be compatible with the newer version
Clean registry
Run a registry cleaner. I used the free one as part of the Tweaknow Power pack
Manual registry clean up
Run Regedit in admin mode and search for anything Apple and iTunes. (F3 to do next search).
NEW INSTALL
Go to http://www.oldapps.com/itunes.php and download iTunes 10.1 (64-bit). I tried later versions but had the same CPU issue (not sure why as I was on the second latest iTunes version which worked find until the upgrade).
Caviat
The above worked for me and was done at my own risk. If you choose to try the above you do so at your own risk and I accept no responsibility and liability what so ever.
I will not be updating iTunes again until I see an official Apple iTunes fix for this issue.
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T410s with extremely poor performanc​e and CPU always near 100% usage
Hi,
I've had my T410s for almost a year now and lately its been starting to get extremely slow, which is odd since it used to be so fast.
Just by opening one program, Outlook, or IE or Chrome, just one window, it will start to get extremely slow and on task manger I can clearly see the CPU usage at 100% or very near.
Also another thing I noticed was the performance index on the processor dropped from 6.8 to 3.6!!!
I did a clean Windows 7 Pro 64Bit install, I have all Windows and Lenovo updates installed and the problem persits
What is happening and what should I do??
Thank you
Nunothank you again for your answer,
I've done that but hard drive health is also ok as you can see from the screenshot.
IAt the time of the screenshot I had just fineshed to boot up the laptop and it wasnt hot at all.
I am getting desperate here, I am unable to work with my T410s
Link to picture
Thank you
Nuno
Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules -
Win 7 pro 100% cpu with only a few programs running
I have a 4.2 rating with a amd athlon 64 3400+ running at 2.41ghz, 2.5 gig ram in 32bit windows 7 pro. My motherboard doesn't have windows 7 drivers which may contribute to the issue. Asus k8N so I have no illusions that this computer should be lightning quick but it is very difficult to keep my patience due to the high cpu constantly. I run about the same as I did in XP and I didn't have nearly the high cpu usage. Outside of antivirus (AVG free), logmein, creative camtray, and tversity running all the time. If I then open Outlook 2007, Firefox more then one tab and itunes, my cpu is at 100%, it's still usable for a definite slow down. I've set the visual effects to best performance and that really hasn't made a difference. What suggestions can you offer other then stopping logmein, the camtray, and tversity all of which are not using hardly any cpu. It's constantly flipping between firefox and itunes primarily.
Hi Cougar78,
I would like to confirm what process uses the high CPU usage you find with Task Manager?
You may update the BIOS and the hardware drivers first to check the issue.
If it does not work, I also would like to suggest you test the issue in Safe Mode and Clean Boot.
What are the results in both modes?
Regards,
Arthur Li - MSFT -
Why does iTunes use 100% CPU all the time, hogging my Macbook Air?
Decided to post this here instead of the iTunes forum, since it might be related to hardware too.
New owner of a 2011 13" Macbook Air, core i5 based.
My problem started about 1 week ago, after it had run out of power completely one day. At the first boot after that it was incredibly sluggish, totally unusable. After waiting for 5 minutes and still being unresponsive, I turned it off and then back on. Then it booted fine. HOWEVER, ever since that time I noticed the following behavior:
- iTunes stays at 100% + CPU all the time, mostly between 100-120%. Even if it's not playing. Even when I deleted the entire library and left it empty.
- iStats reports CPU idle between 50-65%. However, CPU temperature is still about 55 degrees C (which, I think, is far less than what it should have been with 50% idle cpu). I can confirm the low temperature by touching the chasis.
- the cursor freezes and jumps every few seconds, making the mac kind of unusable with iTunes open.
This has been going on for 2 weeks now. The problem goes away every now and then (iTunes sometimes goes back to regular CPU usage of 3-5%), but most of the time it's there.
Help!
P.S.
Mac OX X 10.7.2
iTunes 10.5.2Cee Pee You, is a OS modification. Apple recommends that you un-install these prior to a OS update because Apple makes changes to the OS all the time which breaks programs like these.
I avoid Unsanity LLC products like the plague. Notice the company is a Limited Liability Corporation (LLC), which makes it difficult to sue the company in case of a defective or malicious product. So the risk using their products is all yours. Their APE framework modules have been used for malicious purposes because anyone can write a module that uses the APE framework.
I also avoid installing anything that requires a administrative password unless I completely trust the source, like Apple mostly. That admin password is the key to the security of our machines, not to be given out lightly or carelessly.
You'll have to contact Unsanity's [email protected] because what I'm reading online is it's very difficult to remove as it doesn't "exist".
http://forums.macosxhints.com/archive/index.php/t-3616.html -
I am having a problem with Lightroom 5 being very slow, utilizing 100% CPU, then freezing or closing the program. How do I fix it?
I just upgraded to LR5 from LR3 on Sunday as well as CS6 from CS5 (which I have not tried out yet). I spent several hours talking with Vamil, from LR Support Staff yesterday. He was extremely helpful and kind and tried everything he could think of while remote-handling my PC and talking with me on the phone. He deleted preferences, cache, temp files, updated graphics with a new replacement file from AMD site, then re-downloaded and reinstalled LR5.
It is still very slow and then freezes and closes down with a message of utilizing 100% CPU. Within several seconds of using the brush in Develop, I started having lots of problems. I could not even move the picture around. The side screens would not disappear like they should. And I could not move to another picture. The day before I spent several hours trying to work on just 1 picture. After all the changes yesterday, I tried to move from picture number 1 to about 130 after having not touched it for 10 minutes, and a half hour later, it still said, "Processing" with no picture coming up, just a blank prieview pane.
LR Support suggested I get a new CPU though he thought according to specs mine should be ok and other programs were running fine.
My PC is only 2 years old.
I talked to HP briefly about CPU updates for my HP PC. He said I probably do not have a problem but suggested I run self-diagnostics and maybe buy a new CPU anyway.
I ran diagnostics listed through the HP Support Assistant connection on my PC. All was ok.
I still researched if I could buy a compatible CPU upgrade. I cannot even find any CPUs still selling that are listed for my PC. Best Buy Store said they could not even order a compatible CPU. They said my Bus speed may not be big enough, so they suggest I get a new PC. What Bus speed do I need?
I have the following PC Setup:
AMD Phenom II X6 1045T Processor 2.70 GHz with 6 Cores
with 2700 MHz Base, 3200 MHz Boost, and 4000 System Bus Speed, and 95 watts;
HP Pavilion Elite, HPE-500y, 900 GB Free, new in 2011;
Windows 7, 64 Bit;
RAM 16 GB, DDR3;
Graphics AMD Radeon HD 6450;
Nikon, D200, with Raw Files;
External Hard Drive for Original Photos, 600 GB Free;
LR Catalog and Library are on Main Hard Drive;
Monitor, Sony CPD-200ES, new in 2004.
I am thinking of buying a new monitor tonight mostly so I can do better photo work while enlarging the pictures to do it. I am concerned that while it will help my viewing, it will take more power away, and make my usage of LR5 even worse. Will a new monitor affect my performance? I am looking at HP Monitors with IPS. Is this the best recommended choice for LR and Photoshop CS6?
I think I would like to stay with a 6 core processor since I need to have several items open for other non-Photoshop functions. When running LR5, I had everything else closed. With LR3, I was able to have other things open.
I do not really want to buy a new computer and know that those I have talked with at this point are only guessing after looking for what they thought should fix it. 4 People from Lightroom Support have all thought I should not be having problems with my setup.
I bought one of the best computers 2 years ago. Is it really obsolete already so that I cannot use LR5? Is everyone else buying a new PC every 2 years? I used to go 5-7 years.
Even though I have figured out some of what my PC has, I really do not know technically what I am talking about so am at the mercy of other's help. Are there any solutions that might work short of buying a new computer?
I also have taken 40th anniversary photos for some people and am waiting to give them as a free gift since I am not a professional at all. I am hoping to get through this problem soon so that I can provide some nice memories for them.
I have not gotten any further than trying to adjust 1 picture. I have no comments on uploading speed, since I did that while still in LR3.
Thank you for your time and help.I'm running LR with no speed issues on an Intel 17-860 quad core with about the same performance as your AMD Phenom II X6 1045T Processor. My system is also an HP, which originally had a single 1TB 7200 HDD. I've since added a second 2TB Black Caviar HDD, which provided no significant difference in LR's performance.
AMD processors do not implement hyper-threading and don't need it. I'd start debug by process of elimination:
1) Disconnect all externally attached USB, FireWire, or other externally connected devices except keyboard, mouse, and your single 1280 x1024 display. This includes all externally attached memory card readers, phones, ipads, etc.
2) Reboot and logon as Administrator.
3) Remove your Internet connection and turn off all Antivirus and firewall programs.
4) Open LR and under Catalog Settings set 'Standard Preview Size' to 1440 (slightly larger than your display width). Under the Metadata tab here make sure 'Automatically Write changes into XMP is NOT checked.
4) Create a 'New Catalog,' Create a new folder and add about 10 raw image file copies to it for testing, and Import it into the new catalog. In the Import module make sure under File Handling 'Render Previews' has 1:1 selected. Wait until all Preview building has completed in the Library module.
Try editing these image files inside the new catalog as you were previously. -
I have iTunes 10.4 and every time I open it my CPU usage hits 100%. This makes my computer really slow and almost unusable. How do I stop this? Another effect is that I cannot log onto the iTunes Store. I click on it and it says it is loading the iTunes store but the window remains blank.
So do I!
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hi i have a big problem whit the performance of my laptop. I bought a extra 4gb ram for the second slot that not exist; and still continuos getting my cpu usage at 100% whit 2 programs running like office and google crhome.
i have this specf of my latop:
- procesor: amd c-60 apu whit radeon hd graphics 1,00 ghz
- ram: 4gz
system type: 64-bit OS
winows 7 ultimate
please tell me if i have to install another OS, made changes in my configuration or just buy another laptop.
tksRundll32.exe Using High CPU on Windows 8.1
I use a Lenovo T440s laptop for my service calls and when I need to do work remotely. My laptop runs Windows 8.1 Professional. I love this laptop and it has proved to be tough as well as extremely fast. I noticed a couple weeks ago that my battery was going dead after about an hour of usage. I also noticed that my cooling fan in the laptop was running louder than normal. I decided to open Task Manger on my laptop to see what the issue was. I soon noticed that a process called rundll32.exe was using around 25 percent of my CPU. I killed the process and everything returned to normal.
A few days later, my battery was going dead very rapidly. My cooling fan was on almost constantly and was blowing warm air. I opened Task Manger and sure enough, rundll32.exe was using 25% of my CPU again. I killed the process and everything was fine. It wasn’t long and my laptop was doing the exact same thing as I described before. I decided it was time to get to the bottom of this issue. Here is how I troubleshot what program was using the rundll32.exe and in the process was killing my battery.
Step One: I downloaded Process Explorer. This is an excellent tool. It is similar to Task Manager but goes into way more depth on the processes and dlls that are running. I extracted the download and then ran Process Explorer as an administrator.
Step Two: One of the first things I noticed was rundll32.exe was using 23 percent of my CPU again.
I right-clicked on the rundll32.exe process and selected properties. I clicked on the Image tab and at once saw the culprit. A utility to monitor and gauge my battery usage, called PwrMgrBkGndMonitor, was draining my battery instead of saving it.
Step Three: After a little digging around in my installed programs I located a program called Lenovo Settings Dependency Package. PwrMgrBkGndMonitor was installed in the Lenovo Settings Dependency Package.
I didn’t use this program and decided I didn’t need it. I uninstalled the program and restarted my laptop. I haven’t had a problem with the rundll32.exe using up my CPU since I uninstalled Lenovo Settings Dependency Package.
If you are experiencing the same symptoms has stated above and you are running a Lenovo laptop with Windows 8.1, this may be your issue. However, before you uninstall the program I would recommend using Process Explorer. Process Explorer will help you determine the exact program that is giving you issues before blindly uninstalling and killing services. I hope my troubleshooting steps can help you find program is making rundll32.exe use high CPU usage. Let me know in the comments if this helped you!
Source: techspeeder.com -
Queue consumer stops with 100% cpu usage
I'm trying to use Berkeley DB queue with transactions. When I tested what happens when transactions with DB_APPEND are aborted I found that while it works and DB_CONSUME correctly skips over rolled back records, unfortunately extents that have those records are never deleted, which causes database to always grow. Next I tried DB_CONSUME with database opened using DB_INORDER flag and it seems there's a serious regression in Berkeley DB that causes it to loop indefinitely with 100% cpu usage when it encounters a rolled back record. I tested various versions and found that this bug doesn't happen with 5.1.29, but it is reproducible with 5.2.42, so this regression might have been introduced in 5.2. I have also tested 5.3 and 6.0, and both have this behavior. There may be something wrong with the way queue records are rolled back, one indication of that would be that in 5.1.29 doesn't have neither of the two problems I found with DB_QUEUE: extents are deleted after being consumed, and there are no issues when consuming with DB_INORDER either.
You can find Python code to reproduce this issue here:
https://gist.github.com/snaury/027a3c546f5b0a62a440
Sorry for using Python and not e.g. C++, but it's a lot shorter that way.We have looked at the issues and they are valid. We will roll the fixes out for this in our next release of BDB. The test case was very useful and really helped to speed the process up. If you have any questions, please contact me directly at [email protected] Thanks again for bringing this to our attention.
thanks
mike -
Tomcat 4.0 and Oracle 10g takes 100% CPU and grinds to a halt
Hi, I have a system to support that is currently running on Tomcat 4.0 on a Windows Server 2003 R2 SP2 machine with 3.06Ghz, 4Gb Memory, 2Gb Page file connecting to an Oracle 8.1.6 database on a Windows NT 4 virtual server with 3.2Ghz, 1152Mb Memory, 1536Mb Page file.
I have another Windows virtual server 2003 R2 SP2 machine with 2Gb of memory and a 4Gb page. This server has Tomcat 4.0 and an Oracle 10.2.0.3.0 database. I have made sure that the Oracle 10g classes12.jar file is used.
I am trying to run the application on the new server. In some tests I had users logging on one by one for the first 5 users - performance was great and the application ran faster than the current live system. When I then got another 10 - 15 people logging on the CPU stuck at 100% on the server, even exploring the server was almost impossible, and the application slowed down to unworkable.
We dont know if the problem lies with the very fact that we are trying to connect to a 10g database which is cost based and the application was written using rule based Oracle 8. Or is it the virtual server? Or is it the fact that we have both the application and the database on the same server.
I dont know if it is possible to have another Tomcat4.0 server running on our live server but connecting to the 10g database - what would happen with classes12.zip and classes12.jar? would there be a conflict?
I would really appreciate some help here. You should know though that I am not a hardened java programmer - I can dabble, but am an Oracle Forms, Reports, Discoverer, SQL person by trade. I am also a trainee DBA, so again am not an expert by any means.
Thanks in advance for your help
Lizzielizzie8 wrote:
Hi, I have a system to support that is currently running on Tomcat 4.0 on a Windows Server 2003 R2 SP2 machine with 3.06Ghz, 4Gb Memory, 2Gb Page file connecting to an Oracle 8.1.6 database on a Windows NT 4 virtual server with 3.2Ghz, 1152Mb Memory, 1536Mb Page file.Tomcat 4? We're up to Tomcat 6. The important difference is the JDK supported. What JDK are you using for Tomcat?
>
I have another Windows virtual server 2003 R2 SP2 machine with 2Gb of memory and a 4Gb page. This server has Tomcat 4.0 and an Oracle 10.2.0.3.0 database. I have made sure that the Oracle 10g classes12.jar file is used.classes12.jar is pretty old technology. The JAR should match your JDK and version of Oracle.
I am trying to run the application on the new server. In some tests I had users logging on one by one for the first 5 users - performance was great and the application ran faster than the current live system. When I then got another 10 - 15 people logging on the CPU stuck at 100% on the server, even exploring the server was almost impossible, and the application slowed down to unworkable.You don't say anything about the whether or not you're using a connection pool or what's happening to the open connections and cursors. If you find that those are drifting up over time, it's likely that the code isn't closing resources properly.
We dont know if the problem lies with the very fact that we are trying to connect to a 10g database which is cost based and the application was written using rule based Oracle 8. Or is it the virtual server? Or is it the fact that we have both the application and the database on the same server.Database and app server should be separated, IMO.
I dont know if it is possible to have another Tomcat4.0 server running on our live server but connecting to the 10g database - what would happen with classes12.zip and classes12.jar? would there be a conflict?
I would really appreciate some help here. You should know though that I am not a hardened java programmer - I can dabble, but am an Oracle Forms, Reports, Discoverer, SQL person by trade. I am also a trainee DBA, so again am not an expert by any means.You need more data. Get some tools to see where the time is being spent. Start monitoring your Oracle connections and cursors to see what's going on. Install some filters to get raw timings on your Java calls. Without data, you're guessing in the dark.
% -
100% CPU usage, causes background music to stutter//pause
Hey, I asked this question before but didn't find the answer I was looking for.
This issue happens when drawing with the brush (before lifting my wacom pen for the lines to get optimized) or any action where calculations are being made (like skewing). As I'm drawing lines, the CPU jumps to 100% usage and my sound (playing off a USB sound card) stutters or pauses. Once I let go of my action, CPU usage comes back down and music resumes. I just installed new drivers, but the problem persists. This happened before using a soundcard as well.
Windows 7 64bit
2.8 core duo
8GB RAM
Thanks for helping !Hi Dave,
I do appreciate the urgency of your situation. Having said that, I would ask you to be patient till your query is resolved. I have forwarded your query to the concerned people at Adobe, and someone should get in touch with you very soon. Meanwhile, I would much appreciate it if you could refrain from commenting on experts who spend precious time trying to help other users. Many users have benefited from their expertise, and Adobe holds them in high esteem.
Thanks,
Preran -
Hi all,
We've bought about ten pieces (HP LaserJet Pro MFP M127fn), tested only one the other 9 are waiting for their time to be sent in our branch offices. The MFP works fine, no complains till later that day I noticed that our Mikrotik Router was struguling with high CPU usage, it took me some time to find the issue and it was the new bought MFP. Don't know why but it creates hundreds of UDP connections and almost 100% CPU usage goes to DNS service. As soon as I shutdown the MFP and delete all the connections everything goes back to normal. I've disabled almost all services (HP web service, Ipv6, SNMP, AirPrint, SLP, LPD, WS-Discovery, Bonjour), leaving only Ipv4 but without luck the issue persists. Here are some print screens confirming my saying:
http://i.imgur.com/UiOPSiu.jpg
http://i.imgur.com/dlgObPb.jpg
http://i.imgur.com/4RmQhot.jpg
http://i.imgur.com/oBuo9UO.jpg
http://i.imgur.com/Zf77V6b.jpg
Don't know if it is the same case but it look like, found this post that ha no answer to the issue: http://h30434.www3.hp.com/t5/Printer-Networking-and-Wireless/New-HP-LaserJet-Pro-MFP-M127fw-network-...
Why does this happen? And how to solve my issue? Thank you in advance.Hi @EugenX ,
I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publicly post serial numbers and case details.
If you are unfamiliar with how the Forum's private message capability works, this Post has instructions.
Thank You.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Gemini02
I work on behalf of HP -
I tried to add this in the topic already open but it kept sending me through the unending rabbit holes!
My question is: How do I figure out what release I was on, get rid of this one and got back to a functional firefox that moves in realtime. I already did all the reset and etc.... I just want to go back to the speed I had. This halting , hanging up misery of a browzer is Sad. I have had firefox for years and always recommended it ..... BUT NOT ANY MORE. I agree with the other poster ... there should be a rollback feature. Peoples time has value and right now FireFox is sucking the value down a rabbit hole.
See Below Comment Feedback submitted before I finally got here:
This new version of FireFox is making me nutz! It is SUCKING 100% CPU time almost constantly. I could just pull my hair out. I wpdated once a month or so ago and it slowed down..... but the latest update before I did the reset really slowed me down. I came here to fix it a couple of dayz ago and did the reset firefox and now it IS RUNNING SO POORLY AND SLOW I AM ABOUT TO KILL IT OFF MY MACHINE!!! Yes that is me yelling - and it happened in SSSSSSSSSSSSS LLLLLLLLL OOOOOOOO WWWWWWWWWW Motion. I have run all the security scans and cleanups ---this needs a fix ASAP!!! PS: The hang ups and slowness is EVERYWHERE I go. I only get speed doing programs not connected to ON LINE.Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you. -
Whenever I click a link that is designed to open in a new window Firefox goes straight to 100% cpu usage and I have to go through the Windows "end now" sequence to close the program. I've tried opening one of the links in a new window but I think it was done in java not html (not sure if all the links are java when this happens as that's the only one I've tested). Not sure what details someone might need but this is on my Mom's older laptop with Windows XP Media Center Edition Ver. 2002 Service Pack 2. Hmmm just saw the SP2 will try to update and see what that does though I don't think that's the issue.
So what is happening or not happening now ? The problem computer is your Moms, but I assume your own computer works ok. Have you tried that on the same internet connection as your Mom uses & visiting the same sites?
Also try Internet Explorer. If that is also very slow the problem may not lie with Firefox.
I suggest you try the Firefox Reset feature on your Mom's computer,
* BUT first of all
**make a note of the software extensions that are in use, and bookmark their download and support sites.
** back up the Firefox profile [[Back up and restore information in Firefox profiles]]
* follow the instructions in the following article, after reading the caution about what will be lost
**[[Reset Firefox preferences to troubleshoot and fix problems]] -
IMac at 100% CPU after 10.5.8 update
The update to OS 10.5.8 appears to be running OK on my MB Pro, but not on an iMac I did a fresh install of OS 10.5 and then upgraded to 10.5.8 - the CPU is at 100% all the time!
What process is consuming all of the CPU resources? /Applications/Utilities/Activity Monitor. Without know what is consuming resources, it would be difficult to make a determination.
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100% CPU Usage Overhead running EM DBConsole 11g on OEL-5.2
After upgrading to OEL-5.2 and relinking all Oracle binaries, my old Oracle 11g installation, installed several months before on OEL-5.1, has been working well, including Enterprise Manager Database Console working nicely as always with respectful performance. Unfortunatelly, it lasted just several days.
Yesterday I decided to uninstall the 11g completely and perform new clean installation (software and database) with the same configuration options and settings as before, including EM dbconsole, all configured using dbca. After completing the installation (EM was started automatically by dbca), oracle continued to suck 80-85% CPU time. In further few minutes CPU utilization raised up to 99% due to only one (always the same PID) client process - "oracleorcl (LOCAL=NO)". For first ten minutes I didn't care too much since I always enable Automatic Management in dbca. But after two hours, I started to worry. The process was still running, consuming sustained 99% of CPU power. No other system activity, no database activity, no disks activity at all!
I was really puzzled since I installed and reinstalled the 11g at least 20 times on OEL-5.0 and 5.1, experimenting with ASM, raw devices, loopback devices and various combinations of installation options, but never experienced such a behaviour. It took me 3 minutes to log in to EM dbconsole as it was almost unusable performing too slow. After three hours CPU temperature was nearly 60 degrees celsius. I decided to shutdown EM and after that everything became quiet. Oracle was running normally. Started EM again, the problem was back again. Tracing enabled, it filled a 350 MB trace file in just 20 minutes. Reinstalling the software and database once again didn't help. Whenever EM is up, the CPU usage overhead of 99% persists.
Here is a cca 23 minutes session summary report taken from EM dbconsole's Performance page. The trace file is too big to list it here, but it shows the same.
Host CPU: 100%
Active Sessions: 100%The details for the Selected 5 Minute Interval (the last 5 min interval) are shown as follow:
TOP SESSIONS: SYSMAN, Program: OMS
Activity: 100%
TOP MODULES: OEM.CacheModeWaitPool, Service: orcl
Activity: 100%
TOP CLIENT: Unnamed
Activity: 99.1%
TOP ACTIONS: Unnamed (OEM.CacheModeWaitPool) (orcl)
Activity: 100%
TOP OBJECTS: SYSMAN.MGMT_JOB_EXEC_SUMMARY (Table)
Activity: 100%
TOP PL/SQL: SYSMAN.MGMT_JOB_ENGINE.INSERT_EXECUTION
PL/SQL Source: SYSMAN.MGMT_JOB_ENGINE
Line Number: 7135
Activity: 100%
TOP SQL: SELECT EXECUTION_ID, STATUS, STATUS_DETAIL FROM MGMT_JOB_EXEC_SUMMARY
WHERE JOB_ID = :B3 AND TARGET_LIST_INDEX = :B2 AND EXPECTED_START_TIME = :B1;
Activity: 100%
STATISTICS SUMMARY
cca 23 minutes session
with no other system activity
Per
Total Execution Per Row
Executions 105,103 1 10,510.30
Elapsed Time (sec) 1,358.95 0.01 135.90
CPU Time (sec) 1,070.42 0.01 107.04
Buffer Gets 85,585,518 814.30 8,558,551.80
Disk Reads 2 <0.01 0.20
Direct Writes 0 0.00 0.00
Rows 10 <0.01 1
Fetches 105,103 1.00 10,510.30
----------------------------------------Wow!!! Note: no disk, no database activity !
Has anyone experienced this or similar behaviour after clean 11g installation on OEL-5.2? If not, anyone has a clue what the hell is going on?
Thanks in advance.Hi Tommy,
I didn't want to experiment further with already working OEL-5.2, oracle and dbconsole on this machine, specially not after googling the problem and finding out that I am not alone in this world. There are another two threads on OTN forums (Database General) showing the same problem even on 2GB machines:
DBConsole easting a CPU
11g stuck. 50-100% CPU after fresh install
So, I took another, a smaller free machine I've got at home (1GB RAM, 2.2MHz Pentium4, three 80GB disks), on which I used to experiment with new releases of software (this is the machine on which I installed 11g for the first time when it was released on OEL-5.0, and I can recall that everything was OK with EM). This is what I did:
1. I installed OEL-5.0 on the machine, adjusted linux and kernel parameters, and performed full 11g installation. Database and EM dbconsole worked nice with acceptable performance. Without activity in the database, %CPU = zero !!! The whole system was perfectly quiet.
2. Since everything was OK, I shutdown EM and oracle, and performed the full upgrade to OEL-5.2. When the upgrade finished, restarted the system, relinked all oracle binaries, and started oracle and EM dbconsole. Both worked perfectly again, just as before the upgrade. I repeated restarting the database and dbconsole several times, always with the same result - it really rocks. Without database activity, %CPU = zero%.
3. Using dbca, I dropped the database and created the new one with the same configuration options. Wow! I'm again in trouble. A half an hour after the creation of the database, %CPU raised up to 99%. That's it.
The crucial question here is: what is that in OEL-5.2, not existing in the 5.0, that causes dbca/em scripts to be embarrassed at the time of EM agent configuration?
Here are the outputs you required picked 30 minutes after starting the database and EM dbconsole (sustained 99% CPU utilization). Note that this is just a 1GB machine.
Kernel command line: ro root=LABEL=/ elevator=deadline rhgb quiet
[root@localhost ~]# cat /proc/meminfo
MemTotal: 1034576 kB
MemFree: 27356 kB
Buffers: 8388 kB
Cached: 609660 kB
SwapCached: 18628 kB
Active: 675376 kB
Inactive: 287072 kB
HighTotal: 130304 kB
HighFree: 260 kB
LowTotal: 904272 kB
LowFree: 27096 kB
SwapTotal: 3148700 kB
SwapFree: 2940636 kB
Dirty: 72 kB
Writeback: 0 kB
AnonPages: 328700 kB
Mapped: 271316 kB
Slab: 21136 kB
PageTables: 14196 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3665988 kB
Committed_AS: 1187464 kB
VmallocTotal: 114680 kB
VmallocUsed: 5860 kB
VmallocChunk: 108476 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
Hugepagesize: 4096 kB
[root@localhost ~]# cat /proc/slabinfo
slabinfo - version: 2.1
# name <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata <active_slabs> <num_slabs> <sharedavail>
rpc_buffers 8 8 2048 2 1 : tunables 24 12 8 : slabdata 4 4 0
rpc_tasks 8 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
rpc_inode_cache 6 7 512 7 1 : tunables 54 27 8 : slabdata 1 1 0
ip_conntrack_expect 0 0 96 40 1 : tunables 120 60 8 : slabdata 0 0 0
ip_conntrack 68 68 228 17 1 : tunables 120 60 8 : slabdata 4 4 0
ip_fib_alias 7 113 32 113 1 : tunables 120 60 8 : slabdata 1 1 0
ip_fib_hash 7 113 32 113 1 : tunables 120 60 8 : slabdata 1 1 0
fib6_nodes 22 113 32 113 1 : tunables 120 60 8 : slabdata 1 1 0
ip6_dst_cache 13 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
ndisc_cache 1 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
RAWv6 4 5 768 5 1 : tunables 54 27 8 : slabdata 1 1 0
UDPv6 9 12 640 6 1 : tunables 54 27 8 : slabdata 2 2 0
tw_sock_TCPv6 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
request_sock_TCPv6 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
TCPv6 1 3 1280 3 1 : tunables 24 12 8 : slabdata 1 1 0
jbd_1k 0 0 1024 4 1 : tunables 54 27 8 : slabdata 0 0 0
dm_mpath 0 0 28 127 1 : tunables 120 60 8 : slabdata 0 0 0
dm_uevent 0 0 2460 3 2 : tunables 24 12 8 : slabdata 0 0 0
dm_tio 0 0 16 203 1 : tunables 120 60 8 : slabdata 0 0 0
dm_io 0 0 20 169 1 : tunables 120 60 8 : slabdata 0 0 0
jbd_4k 1 1 4096 1 1 : tunables 24 12 8 : slabdata 1 1 0
scsi_cmd_cache 10 10 384 10 1 : tunables 54 27 8 : slabdata 1 1 0
sgpool-128 36 36 2048 2 1 : tunables 24 12 8 : slabdata 18 18 0
sgpool-64 33 36 1024 4 1 : tunables 54 27 8 : slabdata 9 9 0
sgpool-32 34 40 512 8 1 : tunables 54 27 8 : slabdata 5 5 0
sgpool-16 35 45 256 15 1 : tunables 120 60 8 : slabdata 3 3 0
sgpool-8 60 60 128 30 1 : tunables 120 60 8 : slabdata 2 2 0
scsi_io_context 0 0 104 37 1 : tunables 120 60 8 : slabdata 0 0 0
ext3_inode_cache 4376 8216 492 8 1 : tunables 54 27 8 : slabdata 1027 1027 0
ext3_xattr 165 234 48 78 1 : tunables 120 60 8 : slabdata 3 3 0
journal_handle 8 169 20 169 1 : tunables 120 60 8 : slabdata 1 1 0
journal_head 684 1008 52 72 1 : tunables 120 60 8 : slabdata 14 14 0
revoke_table 18 254 12 254 1 : tunables 120 60 8 : slabdata 1 1 0
revoke_record 0 0 16 203 1 : tunables 120 60 8 : slabdata 0 0 0
uhci_urb_priv 0 0 28 127 1 : tunables 120 60 8 : slabdata 0 0 0
UNIX 56 112 512 7 1 : tunables 54 27 8 : slabdata 16 16 0
flow_cache 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
cfq_ioc_pool 0 0 92 42 1 : tunables 120 60 8 : slabdata 0 0 0
cfq_pool 0 0 96 40 1 : tunables 120 60 8 : slabdata 0 0 0
crq_pool 0 0 44 84 1 : tunables 120 60 8 : slabdata 0 0 0
deadline_drq 140 252 44 84 1 : tunables 120 60 8 : slabdata 3 3 0
as_arq 0 0 56 67 1 : tunables 120 60 8 : slabdata 0 0 0
mqueue_inode_cache 1 6 640 6 1 : tunables 54 27 8 : slabdata 1 1 0
isofs_inode_cache 0 0 368 10 1 : tunables 54 27 8 : slabdata 0 0 0
hugetlbfs_inode_cache 1 11 340 11 1 : tunables 54 27 8 : slabdata 1 1 0
ext2_inode_cache 0 0 476 8 1 : tunables 54 27 8 : slabdata 0 0 0
ext2_xattr 0 0 48 78 1 : tunables 120 60 8 : slabdata 0 0 0
dnotify_cache 2 169 20 169 1 : tunables 120 60 8 : slabdata 1 1 0
dquot 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
eventpoll_pwq 1 101 36 101 1 : tunables 120 60 8 : slabdata 1 1 0
eventpoll_epi 1 30 128 30 1 : tunables 120 60 8 : slabdata 1 1 0
inotify_event_cache 1 127 28 127 1 : tunables 120 60 8 : slabdata 1 1 0
inotify_watch_cache 23 92 40 92 1 : tunables 120 60 8 : slabdata 1 1 0
kioctx 135 135 256 15 1 : tunables 120 60 8 : slabdata 9 9 0
kiocb 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
fasync_cache 0 0 16 203 1 : tunables 120 60 8 : slabdata 0 0 0
shmem_inode_cache 553 585 436 9 1 : tunables 54 27 8 : slabdata 65 65 0
posix_timers_cache 0 0 88 44 1 : tunables 120 60 8 : slabdata 0 0 0
uid_cache 5 59 64 59 1 : tunables 120 60 8 : slabdata 1 1 0
ip_mrt_cache 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
tcp_bind_bucket 32 203 16 203 1 : tunables 120 60 8 : slabdata 1 1 0
inet_peer_cache 1 59 64 59 1 : tunables 120 60 8 : slabdata 1 1 0
secpath_cache 0 0 32 113 1 : tunables 120 60 8 : slabdata 0 0 0
xfrm_dst_cache 0 0 384 10 1 : tunables 54 27 8 : slabdata 0 0 0
ip_dst_cache 6 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
arp_cache 2 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
RAW 2 7 512 7 1 : tunables 54 27 8 : slabdata 1 1 0
UDP 3 7 512 7 1 : tunables 54 27 8 : slabdata 1 1 0
tw_sock_TCP 3 30 128 30 1 : tunables 120 60 8 : slabdata 1 1 0
request_sock_TCP 4 30 128 30 1 : tunables 120 60 8 : slabdata 1 1 0
TCP 43 49 1152 7 2 : tunables 24 12 8 : slabdata 7 7 0
blkdev_ioc 3 127 28 127 1 : tunables 120 60 8 : slabdata 1 1 0
blkdev_queue 23 24 956 4 1 : tunables 54 27 8 : slabdata 6 6 0
blkdev_requests 137 161 172 23 1 : tunables 120 60 8 : slabdata 7 7 0
biovec-256 7 8 3072 2 2 : tunables 24 12 8 : slabdata 4 4 0
biovec-128 7 10 1536 5 2 : tunables 24 12 8 : slabdata 2 2 0
biovec-64 7 10 768 5 1 : tunables 54 27 8 : slabdata 2 2 0
biovec-16 7 15 256 15 1 : tunables 120 60 8 : slabdata 1 1 0
biovec-4 8 59 64 59 1 : tunables 120 60 8 : slabdata 1 1 0
biovec-1 406 406 16 203 1 : tunables 120 60 8 : slabdata 2 2 300
bio 564 660 128 30 1 : tunables 120 60 8 : slabdata 21 22 204
utrace_engine_cache 0 0 32 113 1 : tunables 120 60 8 : slabdata 0 0 0
utrace_cache 0 0 32 113 1 : tunables 120 60 8 : slabdata 0 0 0
sock_inode_cache 149 230 384 10 1 : tunables 54 27 8 : slabdata 23 23 0
skbuff_fclone_cache 20 20 384 10 1 : tunables 54 27 8 : slabdata 2 2 0
skbuff_head_cache 86 210 256 15 1 : tunables 120 60 8 : slabdata 14 14 0
file_lock_cache 22 40 96 40 1 : tunables 120 60 8 : slabdata 1 1 0
Acpi-Operand 1147 1196 40 92 1 : tunables 120 60 8 : slabdata 13 13 0
Acpi-ParseExt 0 0 44 84 1 : tunables 120 60 8 : slabdata 0 0 0
Acpi-Parse 0 0 28 127 1 : tunables 120 60 8 : slabdata 0 0 0
Acpi-State 0 0 44 84 1 : tunables 120 60 8 : slabdata 0 0 0
Acpi-Namespace 615 676 20 169 1 : tunables 120 60 8 : slabdata 4 4 0
delayacct_cache 233 312 48 78 1 : tunables 120 60 8 : slabdata 4 4 0
taskstats_cache 12 53 72 53 1 : tunables 120 60 8 : slabdata 1 1 0
proc_inode_cache 622 693 356 11 1 : tunables 54 27 8 : slabdata 63 63 0
sigqueue 8 27 144 27 1 : tunables 120 60 8 : slabdata 1 1 0
radix_tree_node 6220 8134 276 14 1 : tunables 54 27 8 : slabdata 581 581 0
bdev_cache 37 42 512 7 1 : tunables 54 27 8 : slabdata 6 6 0
sysfs_dir_cache 4980 4992 48 78 1 : tunables 120 60 8 : slabdata 64 64 0
mnt_cache 36 60 128 30 1 : tunables 120 60 8 : slabdata 2 2 0
inode_cache 1113 1254 340 11 1 : tunables 54 27 8 : slabdata 114 114 81
dentry_cache 11442 18560 136 29 1 : tunables 120 60 8 : slabdata 640 640 180
filp 7607 10000 192 20 1 : tunables 120 60 8 : slabdata 500 500 120
names_cache 19 19 4096 1 1 : tunables 24 12 8 : slabdata 19 19 0
avc_node 14 72 52 72 1 : tunables 120 60 8 : slabdata 1 1 0
selinux_inode_security 814 1170 48 78 1 : tunables 120 60 8 : slabdata 15 15 0
key_jar 14 30 128 30 1 : tunables 120 60 8 : slabdata 1 1 0
idr_layer_cache 170 203 136 29 1 : tunables 120 60 8 : slabdata 7 7 0
buffer_head 38892 39024 52 72 1 : tunables 120 60 8 : slabdata 542 542 0
mm_struct 108 135 448 9 1 : tunables 54 27 8 : slabdata 15 15 0
vm_area_struct 11169 14904 84 46 1 : tunables 120 60 8 : slabdata 324 324 144
fs_cache 82 177 64 59 1 : tunables 120 60 8 : slabdata 3 3 0
files_cache 108 140 384 10 1 : tunables 54 27 8 : slabdata 14 14 0
signal_cache 142 171 448 9 1 : tunables 54 27 8 : slabdata 19 19 0
sighand_cache 127 135 1344 3 1 : tunables 24 12 8 : slabdata 45 45 0
task_struct 184 246 1360 3 1 : tunables 24 12 8 : slabdata 82 82 0
anon_vma 3313 5842 12 254 1 : tunables 120 60 8 : slabdata 23 23 0
pgd 84 84 4096 1 1 : tunables 24 12 8 : slabdata 84 84 0
pid 237 303 36 101 1 : tunables 120 60 8 : slabdata 3 3 0
size-131072(DMA) 0 0 131072 1 32 : tunables 8 4 0 : slabdata 0 0 0
size-131072 0 0 131072 1 32 : tunables 8 4 0 : slabdata 0 0 0
size-65536(DMA) 0 0 65536 1 16 : tunables 8 4 0 : slabdata 0 0 0
size-65536 2 2 65536 1 16 : tunables 8 4 0 : slabdata 2 2 0
size-32768(DMA) 0 0 32768 1 8 : tunables 8 4 0 : slabdata 0 0 0
size-32768 9 9 32768 1 8 : tunables 8 4 0 : slabdata 9 9 0
size-16384(DMA) 0 0 16384 1 4 : tunables 8 4 0 : slabdata 0 0 0
size-16384 6 6 16384 1 4 : tunables 8 4 0 : slabdata 6 6 0
size-8192(DMA) 0 0 8192 1 2 : tunables 8 4 0 : slabdata 0 0 0
size-8192 5 5 8192 1 2 : tunables 8 4 0 : slabdata 5 5 0
size-4096(DMA) 0 0 4096 1 1 : tunables 24 12 8 : slabdata 0 0 0
size-4096 205 205 4096 1 1 : tunables 24 12 8 : slabdata 205 205 0
size-2048(DMA) 0 0 2048 2 1 : tunables 24 12 8 : slabdata 0 0 0
size-2048 260 270 2048 2 1 : tunables 24 12 8 : slabdata 135 135 0
size-1024(DMA) 0 0 1024 4 1 : tunables 54 27 8 : slabdata 0 0 0
size-1024 204 204 1024 4 1 : tunables 54 27 8 : slabdata 51 51 0
size-512(DMA) 0 0 512 8 1 : tunables 54 27 8 : slabdata 0 0 0
size-512 367 464 512 8 1 : tunables 54 27 8 : slabdata 58 58 0
size-256(DMA) 0 0 256 15 1 : tunables 120 60 8 : slabdata 0 0 0
size-256 487 495 256 15 1 : tunables 120 60 8 : slabdata 33 33 0
size-128(DMA) 0 0 128 30 1 : tunables 120 60 8 : slabdata 0 0 0
size-128 2242 2490 128 30 1 : tunables 120 60 8 : slabdata 83 83 0
size-64(DMA) 0 0 64 59 1 : tunables 120 60 8 : slabdata 0 0 0
size-32(DMA) 0 0 32 113 1 : tunables 120 60 8 : slabdata 0 0 0
size-64 1409 2950 64 59 1 : tunables 120 60 8 : slabdata 50 50 0
size-32 3596 3842 32 113 1 : tunables 120 60 8 : slabdata 34 34 0
kmem_cache 145 150 256 15 1 : tunables 120 60 8 : slabdata 10 10 0
[root@localhost ~]# slabtop -d 5
Active / Total Objects (% used) : 97257 / 113249 (85.9%)
Active / Total Slabs (% used) : 4488 / 4488 (100.0%)
Active / Total Caches (% used) : 101 / 146 (69.2%)
Active / Total Size (% used) : 15076.34K / 17587.55K (85.7%)
Minimum / Average / Maximum Object : 0.01K / 0.16K / 128.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
25776 25764 99% 0.05K 358 72 1432K buffer_head
16146 15351 95% 0.08K 351 46 1404K vm_area_struct
15138 7779 51% 0.13K 522 29 2088K dentry_cache
9720 9106 93% 0.19K 486 20 1944K filp
7714 7032 91% 0.27K 551 14 2204K radix_tree_node
5070 5018 98% 0.05K 65 78 260K sysfs_dir_cache
4826 4766 98% 0.01K 19 254 76K anon_vma
4824 3406 70% 0.48K 603 8 2412K ext3_inode_cache
3842 3691 96% 0.03K 34 113 136K size-32
2190 2174 99% 0.12K 73 30 292K size-128
1711 1364 79% 0.06K 29 59 116K size-64
1210 1053 87% 0.33K 110 11 440K inode_cache
1196 1147 95% 0.04K 13 92 52K Acpi-Operand
1170 814 69% 0.05K 15 78 60K selinux_inode_security
936 414 44% 0.05K 13 72 52K journal_head
747 738 98% 0.43K 83 9 332K shmem_inode_cache
693 617 89% 0.35K 63 11 252K proc_inode_cache
676 615 90% 0.02K 4 169 16K Acpi-Namespace
609 136 22% 0.02K 3 203 12K biovec-1
495 493 99% 0.25K 33 15 132K size-256
480 384 80% 0.12K 16 30 64K bio
440 399 90% 0.50K 55 8 220K size-512
312 206 66% 0.05K 4 78 16K delayacct_cache
303 209 68% 0.04K 3 101 12K pid
290 290 100% 0.38K 29 10 116K sock_inode_cache
[root@localhost ~]# cat /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
# Controls IP packet forwarding
net.ipv4.ip_forward=0
# Controls source route verification
net.ipv4.conf.default.rp_filter=1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route=0
# Oracle
net.ipv4.ip_local_port_range=1024 65000
net.core.rmem_default=4194304
net.core.rmem_max=4194304
net.core.wmem_default=262144
net.core.wmem_max=262144
net.ipv4.tcp_rmem=4096 65536 4194304
net.ipv4.tcp_wmem=4096 65536 4194304
# Keepalive Oracle
net.ipv4.tcp_keepalive_time=3000
net.ipv4.tcp_keepalive_intvl=30
net.ipv4.tcp_keepalive_probes=15
net.ipv4.tcp_retries2=3
net.ipv4.tcp_syn_retries=2
net.ipv4.tcp_sack=0
net.ipv4.tcp_timestamps=0
net.ipv4.tcp_window_scaling=0
# Oracle
fs.file-max = 6553600
fs.aio-max-nr=3145728
kernel.shmmni=4096
kernel.sem=250 32000 100 142
kernel.shmmax=2147483648
kernel.shmall=3279547
kernel.msgmnb=65536
kernel.msgmni=2878
kernel.msgmax=8192
kernel.exec-shield=0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq=1
kernel.panic=60
kernel.core_uses_pid=1
[root@localhost ~]# free | grep Swap
Swap: 3148700 319916 2828784
[root@localhost ~]# cat /etc/fstab | grep "/dev/shm"
tmpfs /dev/shm tmpfs size=1024M 0 0
[root@localhost ~]# df | grep "/dev/shm"
tmpfs 1048576 452128 596448 44% /dev/shm
NON-DEFAULT DB PARAMETERS:
db_block_size 8192
memory_target 633339904 /* automatic memory management */
open_cursors 300
processes 256
disk_async_io TRUE
filesystemio_options SETALL -
100% CPU using LabView 7.1 and DSC module
Seven years ago I used BridgeView and PXI to execute a project, and the results were so good that after that initial system, I installed one more using BridgeView, and three more using LabView 7.1.
BridgeView is working very well, but lately, LabView 7.1 is giving me more and more problems. It all started in a system running LabView 7.1 and DSC on Windows XP, using a PXI-8187 controller with a PXI-1042 chassis. I have two PXI-6533 digital I/O boards, one PXI-6030E multifunction, one PXI-6713 analog output board, one PXI-6602 counter board and one PXI-8422 serial com. board. In may/06, all of the sudden, the CPU went to a 100% use. Since I am running PID's to control a flash-butt welding machine in a steel factory, this was extremely dangerous. I changed the controller and everything went back to normal. It was running fine until december/06, when the same behavior appeared again. This time changing the controller did not help. We increased the system memory, from 256 MB to 512 MB and everything worked fine. But one month later (january/07) the fault reappeared. This time we changed the chassis and from that moment to this time, we are running smoothly.
Application problems were suspect from the very first time this problem appeared, but I was unable to identify the source, if any. I used PROFILE VI's and apparently the write/read tags were taking all the processor resources. However, changing the routines and disabling communications, and optimizing CPU intensive programs never solved the CPU overload.
Until now, I was aware of only one system showing this erratic behavior. But today I went to check another system, with a totally different application. This one is used to measure the thickness of the steel sheet on a rolling mill. Is not so resource-intensive, but the maintenance folks told me that every time they turned off this particular system, they always had problems trying to turn it on.
I was suspecting of a PLC-communication related issue, but what I found turned my alarms on. I turned off the system, which was fully functional, and turned it back on, and there it was, CPU load at 100%!. Is exactly the same problem that I have on the welder. This system has a PXI-8184, a PXI-1042 chassis, Windows XP, one PXI-6030E, one PXI-6713 and one PXI-6533. I battled for 20 minutes to put the system back in normal conditions.
I specified every single board, installed everything and programmed all the applications. The BridgeView applications have never showed anything like this. I am using the DSC (Datalogging and Supervisory Control Module) on both applications, and the Lookout Protocol Drivers are communicating to Modicon PLC's.
Please, I need help to solve this issue. I believe none of your actual Knowledge Base "100% CPU" articles apply to my case...
Thanks in advance...
Antonio Jimenez
[email protected]Thanks for your reply...
Yes, sometimes I have the feeling that the systems works again because some file or database gets initialized after so many reboots.
Intentionally I turned off all the events and alarm logging to disk. Also the historical data logging is disabled. This is done by code, every time the main VI is started. This was included precisely to save CPU processing power. However, I am communicating to PLC's, and of course I have to declare variables inside the citadel database to make the communication possible.
Right now I can't have access to the application, because the mill is rolling, but during the next maintenance stop I will check the database location and size, and I could change the directory location the next time the fault comes up.
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