Nominal wrote:
Alan, thanks for the reply. I've done more digging into the issue we
are having and it became apparent that its only happening when we
have qpidd operating in a clustered mode. If I run qpidd with no
clustering enabled its working perfectly, the memory use never
exceeds relative queue depth for the most part. Once I enabled
clustering to one additional node the memory use of qpidd will start
to grow out of control. One thing I notice when running qpid too is
the metrics of this object
org.apache.qpid.broker:queue 3 0
When in cluster mode there is a very excessive amount of Deleted
queue objects that constantly increases. This seems like its due to
failover.* queues.
This is due to a bug[1] that has been fixed on trunk[2], but did not
make it in time for the 0.5 release. If there are active clients when
you add a new node to the cluster, their temporary queues become
'non-temporary' on the new node and don't get cleaned up automatically
when the original owning session ends.
[1] https://issues.apache.org/jira/browse/QPID-1873
[2] http://svn.apache.org/viewvc?view=rev&revision=779183
This is really unfortunate as the main reason the decision was made
to go with qpid was because of the clustering support, and again,
when no clustering is enabled memory use is fine. Any suggestions or
thoughts?
Version wise, we are using the 0.5 release of qpid, with openais
0.80.3. Our clients are running against the C++ API.
Etrik
--- On Thu, 6/11/09, Alan Conway <[email protected]> wrote:
From: Alan Conway <[email protected]> Subject: Re: Qpid C++ Broker
memory use To: [email protected] Date: Thursday, June 11, 2009,
12:03 AM
qpidd is currently using the standard C++ new/delete to manage
memory, so memory freed by qpidd is not necessarily returned to
the OS immediately, particularly if the heap is fragmented. I'm not
surprised at your results, but I haven't done much heap profiling
to date so I can't say much about when you would start to see
memory being released back to the OS.
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