playframework 2.3.x堆大小

Question

Is there a way to set -Xmx when i start the application with "./activator start"

I tried (not working):

./activator start -J-Xmx2g

./activator -mem 2048 start

_JAVA_OPTIONS="-Xmx2g" ./activator  start

It says

"Picked up _JAVA_OPTIONS: -Xmx2g"

but still not working.

Also tried various values in build.sbt and application.conf - no luck

The only way i could make it work was to use "stage" and pass -Xmx2g to the generated shell script, which is fine, but it doesn't detach the console.

I think I tried all I found on google but still no luck. I would like to pass -Xmx to the activator start somehow.

Answer 1

First define an environment variable with your JVM parameters named _JAVA_OPTIONS

export _JAVA_OPTIONS="-Xmx2048m"

and then try the play start or use the activator .

Answer 2

I have found solution. There is some bug in activator shell script, so passing -J-Xmx argument does not remove default mem options. To change mem parameter have a look at your activator script (/usr/local/bin/activator) and have a look how mem parameters are added. Also notice that passing -v argument will print final command to lunch java. Working solution on linux for me is this:

export JAVA_OPTS="-Xmx2700m";activator -v
# Executing command line:
java
-Dactivator.home=/usr/local/bin
-Xmx2700m
-jar
/usr/local/bin/activator-launch-1.3.2.jar

Examples of not working solution:

_JAVA_OPTIONS="-Xmx2048m";activator -J-Xmx2700m -J-Xms1024m -v
# Executing command line:
java
-Dactivator.home=/usr/local/bin
-Xmx2700m
-Xmx2700m
-Xms1024m
-jar
/usr/local/bin/activator-launch-1.3.2.jar

Also not working:

activator -J-Xmx2700m -J-Xms1024m -v
# Executing command line:
java
-Dactivator.home=/usr/local/bin
-Xmx2700m
-Xmx2700m
-Xms1024m
-jar
/usr/local/bin/activator-launch-1.3.2.jar

Answer 3

我认为你需要指定最小和最大堆大小，试试这个：

activator -J-Xmx2048m -J-Xms2048m start