Server memory info in 'about' tab

Hi,
I'm wondering what the amount of memory in the 'about' tab means. Mine says:
" jetty-6.1.x, java 1.7.0_40, Windows Server 2012 (87.6 MB / 140.9 MB)"
I have set the memory size to 512mn in the Subsonic control panel and I tried to set the initial heap size of Java to 1024 mb. So I'm kind of confused as to which memory size that paremeter means.
Thanks,
I'm wondering what the amount of memory in the 'about' tab means. Mine says:
" jetty-6.1.x, java 1.7.0_40, Windows Server 2012 (87.6 MB / 140.9 MB)"
I have set the memory size to 512mn in the Subsonic control panel and I tried to set the initial heap size of Java to 1024 mb. So I'm kind of confused as to which memory size that paremeter means.
Thanks,