<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Thanks Emile.</span></div><div><span>"</span><span style="font-size: 12pt; ">If you have fewer queues than CPU cores then this might be a bottleneck."</span></div><div><span style="font-size: 12pt; "><br></span></div><div><span style="font-size: 12pt; ">I thought this should be other way around- if we have fewer CPU cores than queues, then it might be a bottleneck. Am I correct?</span></div><div><span style="font-size: 12pt; "><br></span></div><div><span style="font-size: 12pt; ">Best,</span></div><div><span style="font-size: 12pt; ">-Uday.</span></div><div><br></div> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span
style="font-weight:bold;">From:</span></b> Emile Joubert <emile@rabbitmq.com><br> <b><span style="font-weight: bold;">To:</span></b> Uday Subbarayan <uday.subbarayan@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> "rabbitmq-discuss@lists.rabbitmq.com" <rabbitmq-discuss@lists.rabbitmq.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, February 9, 2012 4:26 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [rabbitmq-discuss] Max Consumers?<br> </font> </div> <br>
Hi Uday,<br><br>On 08/02/12 22:05, Uday Subbarayan wrote:<br>> We are potentially looking at from 10's to 100's of compute engines. I<br>> know this is bit general question and still would like to check the<br>> community-<br>> <br>> How many consumers that we can attach to a "work queue" in Rabbit MQ<br>> with "fair dispatch"? We are going to run Rabbit MQ (HA mode) in AWS EC2<br>> instances. (we haven't decided the EC2 type yet)<br><br>RabbitMQ does not impose any limit on the number of consumers to a<br>queue. The range you have in mind should work fine, assuming all<br>channels use a small QoS value.<br><br>Bear in mind that the broker allocates an Erlang process for each queue.<br>If you have fewer queues than CPU cores then this might be a bottleneck.<br><br><br><br>-Emile<br><br><br> </div> </div> </div></body></html>