How to increase heap memory for WildFly?

Question

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?

score 116 · Accepted Answer · answered Jul 25 '14 at 16:45

116

Just edit bin/standalone.conf, look for the first occurrence of JAVA_OPTS and change the -Xmx option according to your needs.

answered Jul 25 '14 at 16:45

Harald Wellmann

12,615
4
41
63

1

Do you need to restart Wildfly? – hestellezg Mar 23 '17 at 19:51
5

Yes, a restart is required. – Harald Wellmann Mar 24 '17 at 15:10
2

Better look for what message is prompted when launching the server. It will tell you which conf file is loaded. In my case, on windows, it was prompting: "Calling "\wildfly-10.0.0\bin\standalone.conf.bat"". Therefore, I find the answer from Dulith more useful. – Victor Apr 08 '20 at 13:37

score 24 · Answer 2 · answered Sep 17 '18 at 10:47

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 windows this solution works, this file is used in windows: `bin/standalone.conf.bat` — Ashkan, Apr 14 '20 at 08:55

Hett · Answer 3 · 2020-08-29T09:40:48.270

15

On OS WINDOWS you need to setting standalone.conf.bat

edited Aug 29 '20 at 09:40

answered Apr 06 '17 at 09:25

Hett

3,484
2
34
51

score 6 · Answer 4 · answered Apr 04 '17 at 15:49

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.

score 6 · Answer 5 · answered Sep 29 '17 at 11:11

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.

score 5 · Answer 6 · answered Aug 21 '15 at 22:10

5

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).

answered Aug 21 '15 at 22:10

TomS

1,159
2
17
35

score 3 · Answer 7 · answered Aug 08 '18 at 16:21

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.

How to increase heap memory for WildFly?

7 Answers7

Linked