java - Is it possible to install 64 bit JVM on linux so heap can be larger then 2gb? -


it's 32 bit ubuntu os

rob@laptop:~$ uname -a linux laptop 3.5.0-37-generic #58~precise1-ubuntu smp wed jul  10 17:51:56 utc 2013 i686 i686 i386 gnu/linux   rob@laptop:~$ java -version java version "1.7.0_25" openjdk runtime environment (icedtea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2) openjdk server vm (build 23.7-b01, mixed mode)   rob@laptop:~$ sudo update-alternatives --config java there 3 choices alternative java (providing /usr/bin/java).  selection    path                                           priority   status 0            /usr/lib/j2re1.6-ibm/jre/bin/java               1200      auto mode 1            /home/rob/downloads/jre1.7.0_25/bin/java        1         manual mode 2            /usr/lib/j2re1.6-ibm/jre/bin/java               1200      manual mode * 3            /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java   1051      manual mode

i want able run more 2g of heap

rob@laptop:~$ java -xmx3g -jar tool.jar  error occurred during initialization of vm not reserve enough space object heap error: not create java virtual machine. error: fatal exception has occurred. program exit.  rob@laptop:~$ free -g              total       used       free     shared    buffers     cached mem:            15          2         12          0          0          1

no. 32-bit kernel(and 32-bit cpu well) cannot run 64-bit executable jvm(or other 64-bit executable/elf) choice of os , kernel.


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