syncbase/vsync: eager sync watcher

Make the sync watcher more eager to consume updates from databases by
continuing to process updates as long at it finds some.  Remain fair by
doing a round-robin across databases, taking one batch update from each
database at a time.  Continue doing passes across the databases until
all of them have no further updates pending.

Change-Id: Iaf49be67d5400bd7d57cd0ec954c4da29d3d2cab
1 file changed
tree: 1220686252d50bdcda12b3776349ef0dc45c3621
  1. v23/
  2. x/
  3. .gitignore
  4. AUTHORS
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. VERSION