private int getMaximumUnacknowledgedStanzas()
    {
        return JiveGlobals.getIntProperty( "stream.management.max-unacked", 10000 );
    }
The maximum amount of stanzas we keep, waiting for ack.
@return The maximum number of stanzas.
xmppserver/src/main/java/org/jivesoftware/openfire/streammanagement/StreamManager.java