Maximum number of unconfirmed messages, that this actor is allowed to hold in the memory. if this number is exceeded, Deliver(ActorPath, Func< Int64, Object> , Boolean) will not accept more messages and it will throw MaxUnconfirmedMessagesExceededException. The default value can be configure with the 'akka.persistence.at-least-once-delivery.max-unconfirmed-messages' configuration key. This method can be overridden by implementation classes to return non-default values.

public virtual int MaxUnconfirmedMessages { get; }

abstract MaxUnconfirmedMessages : int with get
override MaxUnconfirmedMessages : int with get