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From Timothy Bish <tabish...@gmail.com>
Subject Re: org.apache.activemq.usage.MemoryUsage consumes 95% of the memory?
Date Fri, 21 Aug 2015 13:52:05 GMT
Sounds a lot like this one I fixed for 5.12.0:
https://issues.apache.org/jira/browse/AMQ-4814

On 08/21/2015 09:45 AM, Christopher Shannon wrote:
> The callbacks are in the parent class, Usage.  They are used to signal when
> the Usage is no longer full.
>
> On Fri, Aug 21, 2015 at 1:02 AM, Tim Bain <tbain@alumni.duke.edu> wrote:
>
>> I see no references to a Map or to a field called callbacks in
>>
>> http://www.grepcode.com/file/repo1.maven.org/maven2/org.apache.activemq/activemq-client/5.11.1/org/apache/activemq/usage/MemoryUsage.java
>>
>> Can you give more details of what you're seeing?
>> On Aug 20, 2015 1:25 PM, "yang.yang.zz" <yang.yang.zz@outlook.com> wrote:
>>
>>> Hi:
>>>
>>> When I tested our product wtih ActiveMQ 5.11.1, we observed a high memory
>>> usage spike in a ActiveMQ broker process.
>>>
>>> This broker has 9G memory configured. It's using memoryCursor to cache
>>> messages. But for each Queue it has a memory limit for 200M.
>>>
>>> Then we observed a high memory usage spike during our test. Having got a
>>> heapdump from this broker. We saw 5.89G live content. But 5.62G is
>> consumed
>>> by a single java class called *org.apache.activemq.usage.MemoryUsage*.
>>> Having looked inside, there is a callbacks List in this class which has
>> 220
>>> million object.
>>>
>>> This MemoryUsage instance is monitoring a Queue which has less than 200MB
>>> content.  Does anyone know why this MemoyUsage has such many object in
>> the
>>> callbacks List and consumed such a huge amount of memory?
>>>
>>> Thanks!
>>> -Yang
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>>
>> http://activemq.2283324.n4.nabble.com/org-apache-activemq-usage-MemoryUsage-consumes-95-of-the-memory-tp4701250.html
>>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>>


-- 
Tim Bish
Sr Software Engineer | RedHat Inc.
tim.bish@redhat.com | www.redhat.com 
twitter: @tabish121
blog: http://timbish.blogspot.com/


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