minor heartbeat tweaks #1312

Merged
merged 2 commits into from Jan 23, 2012
Commits on Jan 23, 2012
  1. flush outgoing heartbeats

    minrk committed Jan 23, 2012
    Prevents mismatch between heartbeat timer and actual heartbeat send/recv events.
    
    Applied in notebook and parallel.
  2. relax default heartbeat period in IPython.parallel to 3s (from 1s)

    minrk committed Jan 23, 2012
    Matches heartbeats elsewhere.  3s should be extremely conservative,
    as most heartbeat responses are O(1ms).