Good call Claus. I've updated the wiki page here: http://activemq.apache.org/how-do-i-find-the-size-of-a-queue.html
Should be a couple hours to propagate through. Thanks! On Thu, Jan 3, 2013 at 1:05 AM, Claus Ibsen <claus.ib...@gmail.com> wrote: > On Wed, Jan 2, 2013 at 9:33 PM, Christian Posta > <christian.po...@gmail.com> wrote: > > Enqueue count = number of messages sent to the queue > > Dequeue count = number of messages ack'd by the consumer > > Inflight count = number of messages sent to consumer's session (and are > not > > ack'd by consumer) > > Dispatch count = messages sent to the consumer (dequeue + inflight) > > > > Nice summary. Christian I think you should add that as a FAQ > http://activemq.apache.org/faq > > > > I asked about the async sends because the producer flow control you hit > was > > the kind that will block the entire connection (instead of just blocking > > that one producer). > > > > > > > > > > > > On Wed, Jan 2, 2013 at 12:41 PM, Mohit Anchlia <mohitanch...@gmail.com > >wrote: > > > >> Thanks again! Is the dispatch queue size the one that relates to what's > >> held in memory? > >> > >> We are using mule and the endpoint has no transactions configured. What > did > >> you mean by forcing async? > >> > >> On Wed, Jan 2, 2013 at 11:06 AM, Christian Posta > >> <christian.po...@gmail.com>wrote: > >> > >> > Correct. The memoryUsage is increased when messages are held in > memory. > >> > This happens when messages are paged in from the store. They are then > >> > dispatched to consumers and held until the consumer acks. > >> > > >> > In your case looks like a particular destination (eventsEndpoint) is > >> > filling up somehow. Can you look in JMX and see how many enqueued, > >> > dispatched, dequeued, inflight etc? Also check to see how many > >> > subscriptions to that destination, and see what those dispatch-counter > >> and > >> > dispatch queue size looks like. > >> > > >> > BTW any chance you're sending (producers) using a transaction, or > forcing > >> > sends to be async? > >> > > >> > > >> > > >> > On Wed, Jan 2, 2013 at 11:51 AM, Mohit Anchlia < > mohitanch...@gmail.com > >> > >wrote: > >> > > >> > > So if I understand correctly I shouldn't be seeing this behaviour > >> unless > >> > > something is being held in memory. We ack immediately so I am kind > of > >> > > wondering what might be going on here. Is there a way to find out > what > >> > > might be happening here? > >> > > > >> > > On Wed, Jan 2, 2013 at 10:03 AM, Christian Posta > >> > > <christian.po...@gmail.com>wrote: > >> > > > >> > > > What info can you provide about how clients are consuming from the > >> > > queues? > >> > > > Any chance there are a bunch of messages "inflight" which haven't > >> been > >> > > > ack'd by the consumer? > >> > > > > >> > > > > >> > > > On Wed, Jan 2, 2013 at 10:20 AM, Mohit Anchlia < > >> mohitanch...@gmail.com > >> > > > >wrote: > >> > > > > >> > > > > I see these messages being logged. Queues are setup to use > >> persistent > >> > > > > store. I am wondering what's causing this messages to get > blocked. > >> I > >> > > see > >> > > > > there is a memoryLimit but if I am using persistent=true then > >> should > >> > > this > >> > > > > be the desired behaviour? > >> > > > > > >> > > > > > >> > > > > 2013-01-02 05:06:13,388 | INFO | > >> > > > > Usage(default:memory:queue://eventsEndpoint:memory) > >> percentUsage=0%, > >> > > > > usage=0, limit=20971520, > >> > > > > percentUsageMinDelta=1%;Parent:Usage(default:memory) > >> > percentUsage=106%, > >> > > > > usage=22366029, limit=20971520, percentUsageMinDelta=1%: Usage > >> > Manager > >> > > > > Memory Limit reached. Producer > >> > > > > (ID:pfdamq301.ie.net-54582-1351809386355-2:1:1:1) stopped to > >> prevent > >> > > > > flooding queue://eventsEndpoint. See > >> > > > > > >> > > > > > >> > > > > <broker xmlns="http://activemq.apache.org/schema/core"; > >> > > > > brokerName="static-broker1" persistent="true" > >> > > > > dataDirectory="${activemq.data}"> > >> > > > > > >> > > > > <!-- Destination specific policies using destination > names > >> or > >> > > > > wildcards --> > >> > > > > <destinationPolicy> > >> > > > > <policyMap> > >> > > > > <policyEntries> > >> > > > > <policyEntry queue=">" > >> producerFlowControl="true" > >> > > > > memoryLimit="20mb"> > >> > > > > <deadLetterStrategy> > >> > > > > <individualDeadLetterStrategy > >> > > > queuePrefix="DLQ." > >> > > > > useQueueForQueueMessages="true" /> > >> > > > > </deadLetterStrategy> > >> > > > > </policyEntry> > >> > > > > <policyEntry topic=">" > >> producerFlowControl="true" > >> > > > > memoryLimit="20mb"> > >> > > > > </policyEntry> > >> > > > > </policyEntries> > >> > > > > </policyMap> > >> > > > > </destinationPolicy> > >> > > > > > >> > > > > <!-- Use the following to configure how ActiveMQ is > exposed > >> > in > >> > > > JMX > >> > > > > --> > >> > > > > <managementContext> > >> > > > > <managementContext createConnector="true"/> > >> > > > > </managementContext> > >> > > > > > >> > > > > >> > > > > >> > > > > >> > > > -- > >> > > > *Christian Posta* > >> > > > http://www.christianposta.com/blog > >> > > > twitter: @christianposta > >> > > > > >> > > > >> > > >> > > >> > > >> > -- > >> > *Christian Posta* > >> > http://www.christianposta.com/blog > >> > twitter: @christianposta > >> > > >> > > > > > > > > -- > > *Christian Posta* > > http://www.christianposta.com/blog > > twitter: @christianposta > > > > -- > Claus Ibsen > ----------------- > Red Hat, Inc. > FuseSource is now part of Red Hat > Email: cib...@redhat.com > Web: http://fusesource.com > Twitter: davsclaus > Blog: http://davsclaus.com > Author of Camel in Action: http://www.manning.com/ibsen > -- *Christian Posta* http://www.christianposta.com/blog twitter: @christianposta
