How to increase heap memory for WildFly?
JavaPerformanceWildflyHeap MemoryJava Problem Overview
WildFly 8 is started on a linux server with standalone.sh. I noticed that the server was started with very few heap memory space.
I need to increase the heap memory space for the server and for applications, which are running on the server. How can I do it?
Java Solutions
Solution 1 - Java
Just edit bin/standalone.conf, look for the first occurrence of JAVA_OPTS and change the -Xmx option according to your needs.
Solution 2 - Java
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.
Solution 3 - Java
On OS WINDOWS you need to setting standalone.conf.bat
Solution 4 - Java
if wildfly 8 is used along with JDK 8, We need to add MaxMetaSpace Size. For example, JAVA_OPTS="$JAVA_OPTS -XX:MaxMetaspaceSize=256M" As we all know Java 8 does not support Perm gen setting. For related information, Please check Wildfly Heap issue
I hope it helps.
Solution 5 - Java
I am running Eclipse and changing the 'bin/standalone.conf' didn’t work for me. In this case the solution was oppening the 'Servers' view in Eclipse, double-click the Wildfly server, go to 'Open launch configuation' and do that changes there in 'VM argumments'. Anyway I am a bit noob with Wildfly, I hope other users could contrast my info, I found that in http://www.nailedtothex.org/roller/kyle/entry/articles-wildfly-jvmparams
Its for a Linux server, but I think it could work for windows too.
Solution 6 - Java
For managed domain you can set it using heap tag (e.g.<heap size="64m" max-size="512m"/>) within jvm in domain.xml or host.xml (depending on the scope you want to address).
Solution 7 - Java
Answer from official documentation:
> For a standalone server, you have to pass in the JVM settings either
> as command line arguments when executing the
> $JBOSS_HOME/bin/standalone.sh script, or by declaring them in
> $JBOSS_HOME/bin/standalone.conf. (For Windows users, the script to
> execute is %JBOSS_HOME%/bin/standalone.bat while the JVM settings can
> be declared in %JBOSS_HOME%/bin/standalone.conf.bat)
** Restart server to make this change effective.