some small changes to statistics in queuedhandler (less locking)
some small changes to statistics in queuedhandler (less locking)

msbahrul/EventStore,msbahrul/EventStore,ianbattersby/EventStore,msbahrul/EventStore,ianbattersby/EventStore,ianbattersby/EventStore,msbahrul/EventStore,msbahrul/EventStore,msbahrul/EventStore,ianbattersby/EventStore,ianbattersby/EventStore