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<p class=MsoNormal><span style='color:#1F497D'>I have the answer. Upgraded
erlang vm to R13xx<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
rabbitmq-discuss-bounces@lists.rabbitmq.com
[mailto:rabbitmq-discuss-bounces@lists.rabbitmq.com] <b>On Behalf Of </b>Davis,
Jeremy<br>
<b>Sent:</b> Tuesday, February 23, 2010 5:58 PM<br>
<b>To:</b> rabbitmq-discuss@lists.rabbitmq.com<br>
<b>Subject:</b> [rabbitmq-discuss] rabbitMQ/Beam only using one core.<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have put together a simple producer (in java) that tries
to push through as much data as possible.<o:p></o:p></p>
<p class=MsoNormal>I create many threads, and each has its own connection, own
direct exchange, and own queue.<o:p></o:p></p>
<p class=MsoNormal>No matter how many connections, threads, exchanges, or
queues, ‘top’ shows a single beam process at 100%, with remaining 7 cores idle.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am running 1.7.2 on ubuntu hardy-heron.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any thoughts?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>------------------------------------------------------------------------------<o:p></o:p></p>
<p class=MsoNormal>//Simplified java below:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> private static
ConnectionFactory factory = null;<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> public RabbitMqProducer()<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
ConnectionParameters params = new ConnectionParameters();<o:p></o:p></p>
<p class=MsoNormal>
params.setUsername(userName);<o:p></o:p></p>
<p class=MsoNormal>
params.setPassword(password);<o:p></o:p></p>
<p class=MsoNormal>
params.setVirtualHost(virtualHost);<o:p></o:p></p>
<p class=MsoNormal> params.setRequestedHeartbeat(0);<o:p></o:p></p>
<p class=MsoNormal> factory = new
ConnectionFactory(params);<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public static String getExchangeName( int
id )<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal> return(
"rabbitTestExchange-" + id );<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public static String getQueueName( int id
)<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal> return(
"rabbitTestQueue-" + id );<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public void go()<o:p></o:p></p>
<p class=MsoNormal> throws Exception<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
List<Writer> writers = new ArrayList<Writer>();<o:p></o:p></p>
<p class=MsoNormal> for( int
x=0;x<numThreads;x++)<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
writers.add(new Writer(x));<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal> for( int
x=0;x<numThreads;x++)<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
writers.get(x).start();<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> private final class Writer<o:p></o:p></p>
<p class=MsoNormal> extends Thread<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal> private final int
id;<o:p></o:p></p>
<p class=MsoNormal> private
Connection connection = null;<o:p></o:p></p>
<p class=MsoNormal> private
Channel channel = null;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public Writer(
int id)<o:p></o:p></p>
<p class=MsoNormal>
throws Exception<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
this.id = id;<o:p></o:p></p>
<p class=MsoNormal>
connect();<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public void
connect()<o:p></o:p></p>
<p class=MsoNormal>
throws Exception<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
connection = factory.newConnection(hostName, portNumber);<o:p></o:p></p>
<p class=MsoNormal>
channel = connection.createChannel();<o:p></o:p></p>
<p class=MsoNormal>
boolean durable = true;<o:p></o:p></p>
<p class=MsoNormal>
AMQP.Exchange.DeclareOk eok = channel.exchangeDeclare( getExchangeName(id),
"direct", durable );<o:p></o:p></p>
<p class=MsoNormal>
AMQP.Queue.DeclareOk qok = channel.queueDeclare(getQueueName(id), durable);<o:p></o:p></p>
<p class=MsoNormal>
AMQP.Queue.BindOk bok = channel.queueBind(getQueueName(id),
getExchangeName(id), getQueueName(id) );<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> public void
send()<o:p></o:p></p>
<p class=MsoNormal>
throws Exception<o:p></o:p></p>
<p class=MsoNormal> {<o:p></o:p></p>
<p class=MsoNormal>
boolean mandatory = true; //Returns error if can't send to queue. (and
persisted for example).<o:p></o:p></p>
<p class=MsoNormal>
boolean immediate = false; //if true, error if can't be consumer immediately.<o:p></o:p></p>
<p class=MsoNormal>
StringBuilder b = new StringBuilder( msg.toString() );<o:p></o:p></p>
<p class=MsoNormal>
b.append("-"+id);<o:p></o:p></p>
<p class=MsoNormal>
byte[] data = b.toString().getBytes();<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>
for( int x=0;x<numRecords;x++)<o:p></o:p></p>
<p class=MsoNormal>
{<o:p></o:p></p>
<p class=MsoNormal>
AMQP.BasicProperties props = new AMQP.BasicProperties();<o:p></o:p></p>
<p class=MsoNormal>
props.setDeliveryMode(2); //persistent message.<o:p></o:p></p>
<p class=MsoNormal>
channel.basicPublish(getExchangeName(id), getQueueName(id), mandatory,
immediate, props, data);<o:p></o:p></p>
<p class=MsoNormal>
}<o:p></o:p></p>
<p class=MsoNormal> }<o:p></o:p></p>
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