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https://issues.apache.org/jira/browse/QPID-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14126970#comment-14126970
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Rob Godfrey commented on QPID-5786:
-----------------------------------
I also note that you are using a prefetch of 1... For a maximal throughput you
might consider increasing this as otherwise you are going to suffer latency
delays on receipt of messages. With a prefetch of 1, a new message is not send
to the client until the previous message has been processed, and the
acknowledgement has been received and processed by the broker. Where there is
only one consumer on a given queue, one can increase the prefetch without fear
of starving competing consumers - and increasing throughput by always having
the next message on hand as soon as the previous message has finished
processing. I'm not sure of the API which you are using for your client, but
in AMQP 0-9-1 terms this is defined in terms of the Basic.QoS command in the
"prefetch-count".
> Memory leak in qpid-java-broker-0.26.tar.gz
> -------------------------------------------
>
> Key: QPID-5786
> URL: https://issues.apache.org/jira/browse/QPID-5786
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.26
> Environment: Linux Mint 15 (64 Bit) - any Linux version should do
> Java // OpenJDK Runtime Environment (IcedTea 2.4.4)
> also tested with Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
> Ruby 1.8.7
> Ruby Bunny Gem 1.2.2
> Reporter: Bobby Flitter
> Attachments: amqp_bunny_qpid.pcap
>
>
> When using the hello bunny example program from Ruby together with Apache
> qpid server the memory consumption of qpid seems to grow continuously.
> Steps to reproduce the problem in Linux:
> wget
> http://ftp-stud.hs-esslingen.de/pub/Mirrors/ftp.apache.org/dist/qpid/0.26/qpid-java-broker-0.26.tar.gz
> tar xzvf qpid-java-broker-0.26.tar.gz
> cd qpid-broker-0.26/bin/
> ./qpid-server
> - in a new terminal
> - meanwhile bunny 1.2.2. is available
> - install ruby amqp bunny
> sudo gem install bunny
> - download hello bunny example
> wget http://pastebin.com/raw.php?i=f6MesMCZ -O hello_bunny.rb
> while true; do ruby hello_bunny.rb ; done
> - in another terminal:
> while true; do grep "^VmRSS" /proc/$(pgrep -f qpid)/status ; sleep 1;done
> - memory consumption of java qpid is growing continuously until
> OutOfMemoryError ends the server
> Unhandled Exception java.lang.OutOfMemoryError: Java heap space in Thread
> Thread-1
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