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: c229402f8b6238a44e8ea7755993ec95d9424b7c
  1. services/
  2. syncbase/