How to increase heap size for jBoss server

Question

I have an upload files scenario in my project   When I m trying to upload the large files it s giving me an OutOfMemory error   That error is related to Java heap size   How can you increase the heap size in Java and which file do I need to alter for this   I m using jboss 5 1 server for running my application

User · Answer

Add following option in jboss in bin standalone conf bat     set  JAVA OPTS -Xms1G -Xmx1G -XX MetaspaceSize 96M -XX MaxMetaspaceSize 1024m

User · Answer

Look in your JBoss bin folder for the file run bat  run sh on Unix   look for the line  set JAVA OPTS   or just JAVA OPTS on Unix  at the end of that line add -Xmx512m  Change the number to the amount of memory you want to allocate to JBoss   If you are using a custom script to start your jboss instance  you can add the set JAVA OPTS option there as well

User · Answer

On wildfly 8 and later  go to  bin standalone conf and put your JAVA OPTS there  with all you need

User · Answer

What to change      set  JAVA OPTS  JAVA OPTS  -Xms1024m -Xmx2048m    Where to change   Normally      bin standalone conf Linux  standalone conf bat Windows    What if you are using custom script which overrides the existing settings  then      setAppServerEnvironment cmd  sh  kind of file name will be there    More information are already provided by one of our committee members  BalusC

User · Answer

I have mentioned the configuration changes needed for the increase of heap size in Windows or Linux environments    Linux   bin standalone conf   Check for the following line    JAVA OPTS   and change it accordingly to suit your heap size needs  -Xms1303m  initial heap size in megabytes -Xmx1303m  maximum heap size in megabytes  JAVA OPTS  -Xms1024M -Xmx2048M -XX MaxPermSize 2048M -XX MaxHeapSize 2048M    Windows   bin standalone conf bat  JAVA OPTS  -Xms1024M -Xmx2048M -XX MaxPermSize 2048M -XX MaxHeapSize 2048M    Now restart the server and it will work without prompting any heap size errors   For more information you can refer this link below   https   access redhat com documentation en-us jboss enterprise application platform 5 html getting started guide adjust memory settings

User · Answer

You can set it as JVM arguments the usual way  e g  -Xms1024m -Xmx2048m for a minimum heap of 1GB and maximum heap of 2GB  JBoss will use the JAVA OPTS environment variable to include additional JVM arguments  you could specify it in the  bin run conf bat file   set  JAVA OPTS  JAVA OPTS  -Xms1024m -Xmx2048m    However  this is more a workaround than a real solution  If multiple users concurrently uploads big files  you ll hit the same problem sooner or later  You would need to keep increasing memory for nothing  You should rather configure your file upload parser to store the uploaded file on temp disk instead of entirely in memory  As long as it s unclear which parser you re using  no suitable answer can be given  However  more than often Apache Commons FileUpload is used under the covers  you should then read the documentation with  threshold size  as keyword to configure the memory limit for uploaded files  When the file size is beyond the threshold  it would then be written to disk

User · Answer

In my case  for jboss 6 3 I had to change JAVA OPTS in file jboss-eap-6 3 bin standalone conf bat and set following values -Xmx8g -Xms8g -Xmn3080m for  jvm to take 8gb space

User · Answer

Use -Xms and -Xmx command line options when runing java   -Xms lt size gt         set initial Java heap size -Xmx lt size gt         set maximum Java heap size   For more help type java -X in command line

User · Answer

Edit the following entry in the run conf file   But if you have multiple JVMs running on the same JBoss  you might want to run it via command line argument of -Xms2g -Xmx4g  or whatever your preferred start max memory settings are     if    x JAVA OPTS     x     then     JAVA OPTS  -Xms2g -Xmx4g -XX MaxPermSize 256m -Dorg jboss resolver warning true

[java] How to increase heap size for jBoss server

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