I have a OpenVZ VPS running CentOS 6.3 64 bit and when I try to install JRE 7 64bit using the command:

rpm -Uvh java.rpm

It gives me this error:

Preparing...                ########################################### [100%]
   1:jre                    ########################################### [100%]
Unpacking JAR files...
        rt.jar...
Error: Could not open input file: /usr/java/jre1.7.0_09/lib/rt.pack
        jsse.jar...
Error: Could not open input file: /usr/java/jre1.7.0_09/lib/jsse.pack
        charsets.jar...
Error: Could not open input file: /usr/java/jre1.7.0_09/lib/charsets.pack
        localedata.jar...
Error: Could not open input file: /usr/java/jre1.7.0_09/lib/ext/localedata.pack

I then tried the command:

java -version

And it gives me this error:

Error occurred during initialization of VM
Could not reserve enough space for object heap
Error: Could not create the Java Virtual Machine
Error: A fatal exception has occurred. Program will exit.

Why does this happen if I have more than enough RAM on the VPS to run this (1GB)? Could it be an issue with the host node of the VPS?

Thanks

EDIT 1: Link to beancounter screenshot http://puu.sh/1xwxB

EDIT 2: Link to htop screenshot http://puu.sh/1xwDl