Use FastUpdates property to choose the high performance updates (True) or the secure updates (False). 

To perform update commands faster, AnyDAC will cache update commands, use primary key fields to locate updated record, does not lock records before editing, does not refresh records after posting updates and avoid some checks inside of a dataset. Setting FastUpdates to True is shortcut for setting:

• UpdateChangedFields = False;
• LockMode = lmNone;
• UpdateMode = upWhereKeyOnly;
• RefreshMode = rmManual;
• CheckRequired = False;
• CheckReadOnly = False;
• CheckUpdatable = False.

property FastUpdates: Boolean;

Update Command Generation, UpdateChangedFields, LockMode, UpdateMode, RefreshMode