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From Christian Posta <christian.po...@gmail.com>
Subject Re: Query on activeMQ Queue's MemoryLimit (consumer getting blocked)
Date Fri, 08 Mar 2013 17:31:17 GMT
Yes, if you allocate only 64MB to the broker to hold messages, then you
will have trouble sending 100MB messages and would run into producer flow
control (above messages). You should increase the broker's internal memory
usage to what your expected message work flow/back log would be and ensure
that consumers are properly consuming messages. Using a file-based cursor
in this case wouldn't make a difference, and in fact for queues you should
just use the default store cursor for persistent messaging.


On Fri, Mar 8, 2013 at 4:29 AM, deepak_a <angeshwar@gmail.com> wrote:

> Hi,
>
> In our system, the activeMQ Queue's MemoryLimit is 64MB (default).
> We use the default message cursor (Store based).
>
> We noticed that if the consumer were to publish multiple messages whose
> size
> exceed 100+MB, we motice that the consumer freezes indefintely.
>
> (I keep seeing this log) - the block time increases to 30 seconds every
> time
>
> 10:43:54,987 INFO  [Queue]
> Usage(Main:memory:queue://queue.incomingEvents:memory
> ) percentUsage=0%, usage=0, limit=67108864,
> percentUsageMinDelta=1%;Parent:Usage
> (Main:memory) percentUsage=102%, usage=68532865, limit=67108864,
> percentUsageMin
> Delta=1%: Usage Manager Memory Limit reached. Producer (ID:XXXXX-189-50602-
> 1362737567247-3:12:2:1) stopped to prevent flooding
> queue://queue.incomingEvents
> . See http://activemq.apache.org/producer-flow-control.html for more info
> (block
> ing for: 1865s)
> 10:44:25,029 INFO  [Queue]
> Usage(Main:memory:queue://queue.incomingEvents:memory
> ) percentUsage=0%, usage=0, limit=67108864,
> percentUsageMinDelta=1%;Parent:Usage
> (Main:memory) percentUsage=102%, usage=68532865, limit=67108864,
> percentUsageMin
> Delta=1%: Usage Manager Memory Limit reached. Producer (ID:XXXXX-189-50602-
> 1362737567247-3:12:2:1) stopped to prevent flooding
> queue://queue.incomingEvents
> . See http://activemq.apache.org/producer-flow-control.html for more info
> (block
> ing for: 1895s)
>
> Is this an expected behavior?
> Is the option to increase the Queue's MemoryLimit the right approach?
>
> We use activeMQ embedded in JBoss - so not comfortable in allocating 70% of
> heap to activeMQ.
>
> is using a File based cursor - the right approach? Does this gaurantee
> messages wil be available even if JBoss goes down?
>
>
> regards,
> D
>
>
>
> --
> View this message in context:
> http://activemq.2283324.n4.nabble.com/Query-on-activeMQ-Queue-s-MemoryLimit-consumer-getting-blocked-tp4664494.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>



-- 
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

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