swapinfo -tam will give you a general overall picture of VM usage.

swapinfo - system paging space information
swapinfo prints information about device and file system paging space.
      (Note:  the term `swap' refers to an obsolete implementation of
      virtual memory; HP-UX actually implements virtual memory by way of
      paging rather than swapping.  This command and others retain names
      derived from `swap' for historical reasons.)