High Cpu Usage Websphere 6.1
Victorian Ship Weighing unique stamp per SSH login Detect the missing number in a randomly-sorted array Why do XSS strings often start with ">? The heap size needs to be at least the size of the .phd file. It's been a long question, so thanks for reading this far. 30 April Update (1) This morning I've noticed that this behaviour only happens after the first request of the day The linperf.sh script from this MustGather URL will collect top -H output as well as ps -eLf output. Source
HTH Tom share|improve this answer answered May 14 '09 at 16:31 Tom 1643 Thanks for the comment Tom. This script should be executed as the root user. This single core file will need to be processed with jextract as noted in the above section. How can I set up a password for the 'rm' command? http://www.ibm.com/support/docview.wss?uid=swg21115785
bo: Blocks sent to a block device (blocks/s). From the JVM Dump, I can see 4 threads with this name. Wily, ITCAM, etc). If there is no GC activity, you need to take a thread dump when your CPU usage crosses a certain threshold using jstack multiple times a few seconds (5-10) apart.
What's actually happening: Every one second or so, the CPU usage for the WebSphere process' CPU usage jumps to anywhere from 7%-20% even though there are no requests being processed at Watson Product Search Search None of the above, continue with my search Correlating CPU usage from top output to a particular thread in the JVM javacore; corelate; core; coredump; ProblemDeterminationDocument Technote Process the resulting system core files (core1.[PID], core2.[PID],...) using the instructions in How to process a core dump using jextract on the IBM SDK on Windows, Linux, and AIX System core gdb install_root /java/jre/bin/java [PID] (gdb) generate core1.[PID] (gdb) detach (gdb) quit
Resolving the problem If you are experiencing performance, hang, or high CPU issues with WebSphere Application Server on Linux, this MustGather will assist you in collecting the data necessary to diagnose In this example it would be PID "19099". Can a router send ARP requests to hosts? i thought about this other JVMs) and how much memory the OS allocates for system processes.
Confusion in fraction notation Do Air Traffic Controllers have to remember stall speeds for different aircraft? How to calculate the expectation of a "ceiling" normal distribution besides Monte Carlo? WAS Performance Management Tuning Toolkit The Performance Viewer can be helpful to monitor for a small set of indicators within a single server (e.g. If the top -H fails on the Linux machine, it is because of a downlevel Procps package (the /proc file system utilities).
share|improve this answer answered Jan 31 '10 at 22:08 Zoran Regvart 3,2351325 add a comment| up vote 0 down vote Very instinctively (being unfamiliar with iSeries platforms) I would look at http://stackoverflow.com/questions/801471/cpu-usage-spikes-in-websphere-6-1 If you are on a unix based environment, then executing the below will give a preview of the utilization of the JVM threads. (PID is the process id for the jvm). The IBM JDK produces javacore files. If specifying multiple Process IDs they should each be separated by a space. (2) Collecting log files: Collect the server logs (SystemOut.log, native_stderr.log,...) from the problematic server(s): profile_root /logs/ server_name /*
The method to choose depends on the documentation collected at the time of the problem. http://getbetabox.com/high-cpu/web-server-cpu-usage-high.html Collecting performance, hang, or high CPU specific information ** IMPORTANT : Please select the link below for the corresponding Operating System, then following the Collecting Data Manually section for the Portal It will be created in the directory from which you execute the script. Not the culprit though.
I asked the customer to do a JVM Dump for me - the only additional information I got from this was the thread name: Thread: 00002F82 Deferrable Alarm : 11 Now Run the JREInstrumenter and locate the JVM bundled with WebSphere if it is not found automatically. All rights reserved. have a peek here Browse other questions tagged websphere cpu or ask your own question.
In how many bits do I fit How can I monitor the progress of a slow upgrade? free: the amount of idle memory. Most often this occurs because of a memory leak.
During the duration of these tests the goal is to monitor and measure how the application performance and server vitals behave.
The key items to look for are: garbage collections that are taking too long to run and whether they are happening too frequently. We have deployed this application locally in our own test environments and also for many other customers all on iSeries with no similar problems. prstat -L -p