On Tue, Nov 9, 2010 at 2:41 PM, Josh Carlson <jcarl...@e-dialog.com> wrote: > Thanks for the quick response Bruce we must be hitting the 5.3 bug where the > persisted messages are not being cleaned up because those messages don't > exist in the queues. > > While on the topic of the systemUsage thresholds. Can you or someone else > describe what the memoryUsage limit refers to. I have read two descriptions, > one here: http://activemq.apache.org/javalangoutofmemory.html that says it is > used to control how much memory is used before non-persistent messages are > spooled to disk. However, we are persisting all messages but yet in the web > console that "Memory percent used" is non-zero. In another document which I > purchased from Total Transaction Management it says that this limits the > amount of memory the broker can use. However, this confuses me as well > because we had it set to 20 MB which doesn't seem like it would be nearly > enough and I have seen the JVM well more than a GB.
Here is another description that includes more detail about the systemUsage element and how it relates to producer flow control: http://activemq.apache.org/producer-flow-control.html At a high level, here is a quick description of the systemUsage element: * memoryUsage - Specifies how much heap memory ActiveMQ is allowed to use * storeUsage - Specifies the amount of disk space that can be used to store persistent messages * tempUsage - Specifies the amount of disk space that can be used to store non-persistent messages Hope that helps. Bruce -- perl -e 'print unpack("u30","D0G)u8...@4vyy9&5R\"F)R=6-E+G-N>61E<D\!G;6%I;\"YC;VT*" );' ActiveMQ in Action: http://bit.ly/2je6cQ Blog: http://bruceblog.org/ Twitter: http://twitter.com/brucesnyder
