Right Way to Set JVM Heap Size

[Amit Dubey]

Hi,

This should be an easy question, but I'm scratching my head right now.
I'm using Play Framework 1.2.3 with Scala-0.9.1. My app is data-
intensive, and I'm running out of memory and have tried adding:

jvm.memory=-Xmx1500m -Xms512m

To conf/application.conf, but this has no effect.

I've also tried:

./play run <app> -Xmx1500m -Xms512m

But looking at jconsole, these options are *prepended* to the default -
Xmx512m -Xms512m. The JVM presumably ignores my first option.

In case you're superstitious, I've also tried swapping the -Xmx and -
Xms.

Also, this is not a memory leak, I have a genuine need for having that
much data in memory.

How do I unambiguously give the JVM more heap space?

Best,
-Amit

[Manuel Bernhardt]

Hi Amit,

yes, this is broken. See
https://play.lighthouseapp.com/projects/74274/tickets/44-jvmmemory-configuration-option-not-taken-into-account#ticket-44-2

A fix is here: https://github.com/playframework/play-scala/pull/20

And it's patiently waiting to be merged in ;-) We use a patched
version of the latest version from head in our environment.

Manuel

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[Amit Dubey]

Thanks Manuel, I will try your fix.

Best,
-Amit