Hello support,

I set in jForex.jnlp (from yesterday) max-heap-size="13512m" (I have RAM 16 GB only for testing). But JForex platform show max allocated 507 M (on live account). And I get OutOfMemoryError. I have Java ver. 8 upd. 45.

How is possible to increase heap size max? I need it very much.

Thanks for help.

Please try using this line:

<java version="1.7+" java-vm-args="-Xmx1024m -Xms32m" />

It works. Thanks very much.

I now use: <java version="1.7+" java-vm-args="-Xms32M -Xmx4G"/>

Here's how to allocate a larger heap from the WebStart bash command line.
Instead of editing the jnlp file, prior to execution; the command line can
be used to do it with the "-J" construct as followed.

Here's what I tried, but wasn't sure it had worked. The -J construct
is suppose to pass the -Xms1g (or 1000m) , etc. to the VM in theory. It's a
24gigabyte server, and I needed the extra headroom in heap to run
a number of Swing-based GUI strategy modules.

#!/bin/bash
# Proper header for a Bash script.
curl https://platform.dukascopy.com/demo/jforex.jnlp > jforex.jnlp
# allocate a gigabyte min and max for heap
javaws -Xnosplash -J-Xms1g -J-Xmx1g jforex.jnlp

The Java Server version:
java version "1.8.0_51"
Java(TM) SE Runtime Environment (build 1.8.0_51-b16)
Java HotSpot(TM) 64-Bit Server VM (build 25.51-b03, mixed mode)


The JForex platform showed an allocation of about 924m in the heap display
which I'm confident is the 1g allocation, just a bit of rounding error
in the heap widget display on JForex

hyperscalper

Hello support,

from Friday (22.1.) I can not start JForex platform if I use JForex.jnl with Xmx params 2G and more. Several minutes ago I made tests with newest jnl file (for 2.45.35) and if Xmx params is 1500M or less started. If params Xmx is 1900M or more, don't start. I have enough free memory.
Maybe is this caused by last java update or is this some Dukascopy restriction?

Thank you.

This is system issue. One issue that can cause this is if 32-bit java is used rather than 64-bit version.

Support, you are right. I had only 32 bit Java. During Java update I was not enough watchfull.

I uninstall it and install 64 bit Java. And I can not run JForex platform. System was almost freezing. Task manager was showing tens of "Java[TM] Web launcher". I have two days Windows 10.
I have installed Java 32 bit again and can run JForex platform, but no more memory.

For further update I will use Java "offline" downloads.