Hi SP,
I dont think SyncFx has a concept of a continous synchronization. So synchronization should always be initiated.
As for using timer, the interval would have to be largely dependent on how often the changes occur. The amount of changes detected and synchronized would have a bearing on the resource usage. If you set the timer too short and where there are no changes, then you may be wasting some processing cycles. If you set it too high, then you might have many changes detected. So you'll have to find the balance.
hth,
JuneT