title: does large value for -Xmx postpone Garbage Collection?
body: <p>I have a lot of JVMs running on a Linux Redhat with 32GB of physical memory and a 32GB of virtual memory. these JVMs are configured to have a total value for Xmx which is more than 32GB and might have the Linux used its virtual memory.<br>
  my question is that if I specify the Xmx more than required heap size would it delay the Garbage Collection and as a result allocate more heapsize than necessary? so that it will cause the OS to allocate memory from its virtual memory which leads to a dwindled performance.</p>