what's the default and best number for setMaxRepetitions when using smnpwalk?

At fisrt I use 10 ,and it is ok.And then I use 20 or 100,it is ok ,too.I wander whether there is a best number for setMaxRepetitions. If I do not set the max repetition, what is the defualt number?

The DefaultPDUFactory uses 5 as default maxRepetions.
The “best” value depends on the performance of the command responder, its memory, the OIDs you want to fetch, etc.