Maximum number of unconfirmed messages, that this actor is allowed to hold in the memory. if this number is exceeded, Deliver(ActorPath, FuncInt64, 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