On Wed, Jul 28, 2010 at 12:43 PM, Brian Crowell <[email protected]> wrote: > On Wed, Jul 28, 2010 at 5:15 AM, Gordon Sim <[email protected]> wrote: >> Are you running the same test scenario as described in 3.3 of that document? >> I.e. Simulating "60 AMQP clients talking to the AMQP broker with 10 shared >> queues". (That is not what you get for perftest with 'default settings' >> which is why I ask what may be a stupid question). > > I'm not. I wanted to start by trying to get a baseline stat for one > queue (that is, how fast can Qpid serve one session?). The actual > scenario I'm working with is closer to: > > ./perftest --mode topic --count 100000 --npubs 4 --size 100 > --pub-confirm no -s > > I had installed on a Windows box, but I'm comparing it to a Linux box > now, and the Linux box is trouncing it. From the comments here, it > sounds like I'll need to go Linux if I ever hope to get any > performance out of it. I had hoped there was something simple I wasn't > doing or some build option I could change, but it sounds like the OS > is a major factor. > > On the above test: > > Windows 2003 (8-core) > Pubs: 5671 msg/sec > Subs: 8672 msg/sec > Total: 17262 msg/sec > Throughput: 1.64 MiB/s > > Debian Linux (1-core?) > Pubs: 5892 msg/sec > Subs: 11343 msg/sec > Total: 22687 msg/sec > Throughput: 2.16 MiB/s > > The other thing I'm worried about is that I can push so much faster > *into* Qpid than I can pull out of it. Messages pile up in the queue > and I run out of memory fast. I suppose for that, I'll have to devote > one queue to each publisher.
You could set max size (in terms of message or bytes) when you create a queue. You could also set a queue policy to tell the broker what it should do if this limit is reached. The default is "reject", which will throw an exception to the publisher saying the queue is full. ( Other options are "ring" and "flow-to-disk" and the latter is obviously very slow). Rajith > --Brian > > --------------------------------------------------------------------- > Apache Qpid - AMQP Messaging Implementation > Project: http://qpid.apache.org > Use/Interact: mailto:[email protected] > > -- Regards, Rajith Attapattu Red Hat http://rajith.2rlabs.com/ --------------------------------------------------------------------- Apache Qpid - AMQP Messaging Implementation Project: http://qpid.apache.org Use/Interact: mailto:[email protected]
