Is the 'one FilePendingMessageCursor (minimum 256K) x Topic Consumer', memory
usage by design ?
It seems that its a lot of wasted memory, Hundreds Of Megabytes are wasted
on those 2 arrays in OpenWireFormat object ( which are all null at the point
when the client creates the topic consumers any way
Try tweaking memoryLimit option on destination policy and/or systemUsage
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Dejan Bosanac - http://twitter.com/dejanb
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After some more heap dump investigation I found what is eating all the
memory.
The dump shows that I have more than 2000 TopicSubscription objects and for
each one there is an FilePendingMessageCursor, which consumes 265K (the
OpenWireFormat object has 2 arrays each consuming 130K).
My question is,
Can this be related to :
ActiveMQ.Advisory.TempQueue,ActiveMQ.Advisory.TempTopic destination ?
I added a breakpoint to the creation of FilePendingMessageCursor in the
TopicSubscription class
and I can see that FilePendingMessageCursor is created 5 times when a client
connects ( and creates consume
I don't use durable topic subscribers at all
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They are used for storing temporary messages in destinations and durable
subscribers, see
http://activemq.apache.org/message-cursors.html
Do you have a large number of durable topic subscribers?
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Dejan Bosanac - http://twitter.com/dejanb
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The experts in open source in
I don't have many destinations.
what is org.apache.activemq.broker.region.cursors.FilePendingMessageCursor ?
it is consuming most of the memory.
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Can you create a test case that reproduces it? Also, are you using a large
number of destinations (in addition to large number of connections)? If,
you might find this useful
http://activemq.apache.org/how-do-i-configure-10s-of-1000s-of-queues-in-a-single-broker-.html
Regards
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Dejan Bosanac - h
