[rabbitmq-discuss] RabbitMQ server performance issue (erl.exe)

[Yogesh Ketkar]

Hello Simon,
This is how code looks like
main(String[] argv) {
    // Read messages from MainQueue
    Channel ch = c.createChannel();
    ch.basicConsume("MainQueue", false, "", new
MainQueueConsumer(ch));

    // Read messages from dynamically declared queues
    ExecutorService es = Executors.newFixedThreadPool(tpSize);
    Collection<QueueProcessor> vAppProcessorCollection = new
ArrayList<QueueProcessor>();
    while(true) {
        // Get the queues currently present using
        // http://<rabbitmq-server>:55672/api/queues/%2f/
        List<String> qs = AMQPUtil.getvAppQueues();
        vAppProcessorCollection.clear();
        for(String q : qs) {
            QueueProcessor p = new QueueProcessor(c, q);
            vAppProcessorCollection.add(p);
        }
        es.invokeAll(vAppProcessorCollection);
    }
}
MainQueueConsumer, in handleDelivery does something like
public void handleDelivery() {
    // Get Queue name from payload
    c.queueDeclare(queueName, true, false, false,
getQueueProperties());
    c.queueBind(queueName, exchange, routingKey);
    c.basicPublish(exchange, routingKey, props, body);
    ch.basicAck(envelope.getDeliveryTag(), false);
}

And QueueProcessor does this in call() method
public Boolean call() {
    try {
        Channel ch = c.createChannel();
        while(true) {
            GetResponse r = ch.basicGet(queue, false);
            if(r != null) {
                // process message
                ch.basicAck(r.getEnvelope().getDeliveryTag(), false);
            } else break;
        }
        Util.queueDelete(ch, queue, true, true);
        if(ch.isOpen()) ch.close();
    } catch(Throwable th) {
        BaseUtil.logException(logger, th);
    }
}

Just couple of things
- If I don't delete the queue in call() method, things are much better
  and I am even able to 50000 messages on MainQueue without much
issues
- Ideally I would like to get rid of while(true) { ... basicGet ... }.
  Is there any pattern where I can do
  basicConsume() on the dynamically generated queue and
  remove the consumer and the queue when number of message on it are 0

regards, Yogesh

On Jan 25, 7:23 pm, Simon MacMullen <si... at rabbitmq.com> wrote:
> On 25/01/12 08:30, Yogesh Ketkar wrote:
>
> > Any clues how to debug this?
>
> That sounds odd. 10k messages should be nothing.
>
> Can you share your code somehow so I can try to replicate this?
>
> Cheers, Simon
>
> --
> Simon MacMullen
> RabbitMQ, VMware
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