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From mickhayes <>
Subject Re: Consumer performance improves after bounce when in cluster setup
Date Thu, 29 Mar 2012 08:23:34 GMT
First of all, for your full-round-trip case (no production of message n+1
until triggered by result returned for message n), you need to know the
network latency. So do traceroute or equivalent both ways. US->AUS and

This gives you a hard limit on how many round-trips you can do per unit time
- i.e. your maximum possible performance for that case. I suggest that it
will be *way below* 100 roundtrips/sec.

You could also turn on full logging:
For each of your brokers, edit the file for debugging (as
indicated in the file itself), and push the button in e.g. jconsole to
reread the file. 
Mbeans tab -> org.apache.activemq -> broker_instance_name -> Broker ->
Operations -> *reloadLog4jProperties *

Finally, you could remove one broker at each site to help understand this.
For sure, they're not helping your performance.

Michael Hayes B.Sc. (NUI), M.Sc. (DCU), SCSA SCNA 

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