How to give Jenkins more heap space when it s started as a service under Windows

Question

I want to increase the available heap space for Jenkins  But as it is installed as a service I don  t know how to do it

User · Answer

You need to modify the jenkins xml file  Specifically you need to change      lt arguments gt -Xrs -Xmx256m      -Dhudson lifecycle hudson lifecycle WindowsServiceLifecycle      -jar   BASE  jenkins war  --httpPort 8080 lt  arguments gt    to       lt arguments gt -Xrs -Xmx2048m -XX MaxPermSize 512m      -Dhudson lifecycle hudson lifecycle WindowsServiceLifecycle      -jar   BASE  jenkins war  --httpPort 8080 lt  arguments gt    You can also verify the Java options that Jenkins is using by installing the Jenkins monitor plugin via Manage Jenkins   Manage Plugins and then navigating to Managing Jenkins   Monitoring of Hudson   Jenkins master to use monitoring to determine how much memory is available to Jenkins   If you are getting an out of memory error when Jenkins calls Maven  it may be necessary to set MAVEN OPTS via Manage Jenkins   Configure System e g  if you are running on a version of Java prior to JDK 1 8  the values are suggestions    -Xmx2048m  -XX MaxPermSize 512m   If you are using JDK 1 8   -Xmx2048m

User · Answer

If you are using Jenkins templates you could have additional VM settings defined in it and this might conflicting with your system VM settings  example your tempalate may have references such as these    lt mavenOpts gt -Xms512m -Xmx1024m -Xss1024k -XX MaxPermSize 1024m -Dmaven test failure ignore false lt  mavenOpts gt     Ensure to align these template entries with the VM setting of your system

User · Answer

In your Jenkins installation directory there is a jenkins xml  where you can set various options  Add the parameter -Xmx with the size you want to the arguments-tag  or increase the size if its already there

User · Answer

If you used Aptitude  apt-get  to install Jenkins on Ubuntu 12 04  uncomment the JAVA ARGS line in the top few lines of  etc default jenkins     arguments to pass to java  JAVA ARGS  -Xmx256m       lt --default value JAVA ARGS  -Xmx2048m   JAVA ARGS  -Djava net preferIPv4Stack true    make jenkins listen on IPv4 address

User · Answer

From the Jenkins wiki      The JVM launch parameters of these   Windows services are controlled by an   XML file jenkins xml and   jenkins-slave xml respectively  These   files can be found in  JENKINS HOME   and in the slave root directory   respectively  after you ve install   them as Windows services       The file format should be   self-explanatory  Tweak the arguments   for example to give JVM a bigger   memory    https   wiki jenkins-ci org display JENKINS Installing Jenkins as a Windows service

User · Answer

I ve added to  etc sysconfig jenkins  CentOS      Options to pass to java when running Jenkins    JENKINS JAVA OPTIONS  -Djava awt headless true -Xmx1024m -XX MaxPermSize 512m    For ubuntu the same config should be located in  etc default

[jenkins] How to give Jenkins more heap space when it´s started as a service under Windows?

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