A couple of things to note:

* When requesting a graph, we have to have a checkout of the archive
  (the DB dump file) so that we can create a temporary DB with the data.
  This is done on demand, and the DB is left in place since its a
  fairly time consuming operation to do the checkout and the dbload.
  I do not delete the DBs though; we will need to age them out as needed.

* Even so, when returning to a page we end up getting the graphs
  again, and that still takes more time then I like to wait. Perhaps
  add a refresh button so that the user has to force a redraw. Might
  need to add a time/date stamp to the graph.