GS.Chandra N wrote:
Adding some more details -

All messages are sent to a new exchange created thus "qpid-config add
exchange headers Feeds". The exchange is shown as not durable in qpid-tool.

There is no increase in size of memory unless subscriptions are created.

When there are no subscriptions and messages are being pumped in ,

                         msgRecieves is equal to msgDrops
                         byteRecieves is equal to byteDrops
                        msgROutes and byteRoutes are zero

                         All other stats for the exchange shows zero

 Though i have 6 server processes pumping in messages and one qpid-tool I
see only 2 queues.They are named mgmt-HOST.port and repl-HOST.port. I
suppose these are created by qpid-tool and not by the exchange processes
since they do not create any queues for sending messages.

When there are subscriptions created and messages are being pumped in,

                       msgRecieves start to climb and msgDrops stay same
                       byteRecieves start to climb and byteDrops stay same
                       msgRoutes and byteRoutes are non zero

It is clear that the messages are for some reason being cached though its
not clear why.

That is as expected. The msgRoutes count tracks the number of messages that are routed to subscriber queues and the msgDrops count tracks the number of messages that were dropped due to there being no matching subscriptions.

If you use the tool to look at the subscription queues while the memory is climbing you can see the queue depth for these.

Are you accepting the messages after the subscriber receives them (or using accept_mode=not_required)? The broker will not dequeue messages from the queue until you do so.

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