[rabbitmq-discuss] Looking for guidance on R14B04 vs. R13B03 performance

Simon MacMullen simon at rabbitmq.com
Fri Feb 17 12:39:42 GMT 2012

On 15/02/12 19:18, Matt Pietrek wrote:
> If I remove the clustering, so as to just hit a single broker, the rate
> goes up to 900 message/sec. Thus, I'm directed back to looking for
> latency between the master/slaves.

I'll poke at this a bit more, but are you absolutely sure that the 
MNESIA_DIR is on a ramdisk on all the machines in the cluster? It's just 
that 36 msg/s is quite close to the performance I would expect with an 
HDD-fsync-per-commit. Just one machine could be slowing the cluster 
down, you won't see tx.commit-ok until the message is on disk on all the 

Cheers, Simon

Simon MacMullen
RabbitMQ, VMware

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