Tagged Questions

0
votes
1answer
24 views

java.lang.OutOfMemoryError: GC overhead limit exceeded TeamCity 7.0

I am getting this error suddenly. Running teamcity 7.0 on a Windows Server 2008. How do I add more memory via passing options to the JVM? I don't understand how to pass the xmx option when using ...
0
votes
1answer
73 views

When the JVM is doing a complete GC, is it expected to see a large number of page fault/sec?

It is Window 2003 server. We are running some performance test, and what we see is: 1. In first 5 hours, the page fault/sec is very small, like 10 or 20 In the last 1 hour, the page fault jumps to ...
0
votes
2answers
215 views

Linux out of memory on VPS

On my VPS (CentOS) 4GB ram (2 + 2 dynamically assigned when needed) and i have tomcat running with following options JAVA_OPTS="-Xms256m -Xmx2048m -XX:MaxPermSize=256m". Now when i try to start ...
1
vote
1answer
535 views

JVM tuning in JBOSS AS 7

Can anyone explain as to where and how do I configure the following JVM parameters to tune JBOSS. I am using the latest JBOSS AS 7. I am using openJDK-6 on Linux. The following are the parameters ...
1
vote
1answer
242 views

Migrating WebLogic 10.3.0 to new host. Slow managed server startup times

We are migrating our Blue Martini Commerce application (only supported on WebLogic 10.3.0) to a new host (Redhat 6.3 on a VMWare ESX vm). We are seeing extremely slow start up times for our managed ...
3
votes
1answer
75 views

How to determine what websites or local applications are using JVM/JRE

We run a large Windows shop -- tens of thousands of workstations. Most have a version of the Sun/Oracle Java Virtual Machine (JVM) installed. With all the security issues around the JVM, we'd like to ...
6
votes
4answers
5k views

Cannot switch, ssh to specific user: su: cannot set user id: Resource temporarily unavailable?

/var/log/secure: su: pam_keyinit(su-l:session): Unable to change UID to 500 temporarily su: pam_keyinit(su-l:session): Unable to change UID to 500 temporarily su: pam_unix(su-l:session): session ...
3
votes
5answers
3k views

How can I monitor memory usage for a windows-based JVM and trigger an alert if it gets too high?

I have an app that runs as a JVM in Windows 2008. I'd like to monitor it's memory usage and be sent an email if/when memory usage reaches a specific threshold. Is there a free utility or method for ...
0
votes
0answers
68 views

ColdFusion JVM: strange memory behaviour

Since last month, we got a problem on our company's server (Win2008ServerStd + IIS7 + CF enterprise 9.0.1 (hotfix2)). I used jConsole to monitor the Coldfusion JVM (1.6.0_24) activity and here's what ...
0
votes
1answer
108 views

JVM garbage collection: What is the difference between “survivor 1” and “survivor 2”?

In Oracle's Java Virtual Machine's Garbage Collector, what are the respective roles of "survivor 1" and "survivor 2" ? Are the objects always moving like: Eden → Survivor 1 → Survivor 2 Or can an ...
0
votes
1answer
768 views

Jenkins (JVM) crashes after few minutes after start

Host OS: OpenVZ host Guest OS: Debian 6.0 minimal Java: java6 sun Servlet container: Winstone Jenkins for debian: http://pkg.jenkins-ci.org/debian/ Jenkins version: 1.449 uname -a: Linux hostname ...
2
votes
1answer
224 views

What are the best practices for monitoring and alerting for low level JVM metrics?

I'm looking to set up monitoring and alerting for java server based app and want to find some best practices for monitoring JVM specific metrics and for designing alerts based on those metrics. So ...
1
vote
0answers
138 views

How to make glassfish v3.1.1 run with -Xmx256m?

I have a t1.micro amazon instance and that machine have very scarce resources. I need for the moment to run glassfish3.1.1 (due to complete JEE6 support) on those conditions. Any guidance is welcome. ...
1
vote
1answer
502 views

Tomcat web application intermittent freeze

I have a Grails web application (just a standard war file) deployed on a Ubuntu 10.10 server running on tomcat 6. My database is postgresql. The problem is that every so often (once or twice a day ...
2
votes
1answer
751 views

how to solve out of memory error in java in amazon ec2 server

can anyone explain about this error message? we are using IBM jre to run java application Its occupying more space on the server. JVMDUMP006I Processing dump event "systhrow", detail ...
1
vote
1answer
1k views

Weblogic administration console way too slow

I've installed weblogic 10.3.3, configured simple domain with default configuration. And after starting weblogic I cannot use it via admin console because it is starting too slow (~10 mins). It seems ...
0
votes
4answers
1k views

Hung Java JVM failing to respond to kill -3

I have a Java VM that is hanging "randomly". I quote the randomly bit, because there is obviously a reason that the VM is hanging, but the hang does not occur periodically. We have the same software ...
2
votes
1answer
198 views

Environment variables and further user setup

I have a jar file, which works in many machines. However we just asked for a new unix user to install it, and it is not behaving the same... wonder if it could be anything related to some env. var. ...
1
vote
2answers
259 views

Running Java on VPS environment

I have been advised by my friend that when running Java on virtual environment, it can suck RAM quite drastically over time and adding more RAM won't make any difference. Is this true? Why is this ...
0
votes
1answer
357 views

Changing WebSphere's JVM to x64 [closed]

Recently i had installed WebSphere Portal 6.1 on my computer with Windows7 x64. But i had discovered that it runs on 32 version of JVM. How can i make it run on x64 ? Should i reinstall webSphere or ...
3
votes
3answers
2k views

Java VM problem in OpenVZ

I bought a vps for hosting my java needs. But I can't run java on it. Everything about java is correctly installed but when I try to run java ("java -version" forexample) I get this error : Error ...
1
vote
2answers
875 views

Glassfish V3 using up all available memory

I have a Virtual Server with 1GB of RAM. When i start glassfish with asadmin start-domain it instantly allocates all available memory, although i defined -Xmx128m in my domain.xml. Am I missing an ...
1
vote
2answers
1k views

JVM memory initializazion error after windows update

We have three Windows Server 2003 with 2 GB RAM. Server1 tomcat 5.5.25 jvm version SUN 1.6.0_11-b03 Server2 tomcat 5.5.25 jvm version SUN 1.6.0_14-b08 ...
5
votes
5answers
5k views

How to reliably take Java Heap Dumps?

My team is running into difficulties when trying to take good heap dumps triggered by OutOfMemoryErrors. For specific reasons we are currently taking the dumps with jmap called from a bash script ...
1
vote
4answers
392 views

Linux distro designed to run a Java service?

Is there a 64-bit linux distro available that is made to run a Java JVM inside of it? What I mean, is that it would be nice to have a simpler distribution of Linux that is small and fast to setup ...
3
votes
2answers
2k views

Which performance metrics to monitor on a JVM?

I want to do some performance monitoring on our JVMs. What would be interesting to monitor besides the obvious things I already have on my list ? JVM Free/Total memory GC rate (how many per minute) ...
6
votes
4answers
6k views

which JVM is best for Tomcat?

I have Tomcat 6.0 up and running. I went to tweak the memory sizes and realized that I have it running on the Sun JDK 1.6 client JVM. I don't have the Sun server JVM installed: C:\>java -client ...
2
votes
3answers
2k views

Installing Java Runtime for a Server: Something better than std JRE package?

I need to install a Java runtime on server machines. The JRE package from Sun acts as if I'm running on a client machine -- it installs WebStart, Auto Updating, probably browser hooks, and other ...
1
vote
2answers
2k views

How to change java version on Tomcat 6 with Xampp

With just Tomcat, it's pretty easy to change the JVM version. But using the tomcat add-on on an xampp install, I can't seem to figure out how to change the JVM to 6 from 5. As well, this is ...
2
votes
2answers
2k views

Performance problems when running Java desktop applications on Citrix Metaframe

We have a desktop Java application running within a Citrix Metaframe server farm and the performance, specially while starting up the app, is very unreliable. Sometimes it takes 15 seconds and ...
1
vote
1answer
1k views

jvm performance tuning tips / resources?

My experience with the jvm has mostly been maintain a tomcat container for several applications. I find myself always not sure of the what ratio of -Xms -Xmx -Xmn -XX:PermSize -XX:MaxPermSize ...
8
votes
4answers
2k views

JVM Memory Consumption

I am trying to run tomcat on a low memory system (150-256Mb). Even though I start the JVM with -Xmx64m (which should be the default anyway), the process immediately takes up 200Mb+. I wonder why the ...
2
votes
5answers
1k views

Tools and Tips for Sun JVM Troubleshooting

We run a cluster of ColdFusion 8 servers on top of the Sun JVM, version 1.6.0_11. Occasionally a server will simply stop responding to requests. We've determined so far that the JVM is locking up ...