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https://issues.apache.org/jira/browse/QPID-7830?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Keith Wall updated QPID-7830:
-----------------------------
Description:
When used for store and forwarding, in some use cases the Broker's heap can
become dominated by duplicates of common values such as routing information
(e.g. {{amq.direct}} or an application's queue name) or common header values
(e.g a application/octet-stream or an application's user id).
On the 0-8..0-91 paths, every enqueued message gets its own
{{MessagePublishInfo}} referencing its own {{AMQShortString}} exchange and
routing keys. For some use-cases, these are drawn from a small set. On the
AMQP 1.0 path, {{Properties#to}} is an example. 0-10 is probably affected too.
This unnecessarily increases the heap requirements of the Broker.
The Broker should adopt a sensible intern/caching policy. Note that in AMQP
1.0, values which are {{Symbols}} have their underlying String automatically
interned.
was:
When used for store and forwarding, in some use cases the Broker's heap can
become dominated by duplicates of common values such as routing information
(e.g. {{amq.direct}} or an application's queue name) or common header values
(e.g a application/octet-stream or an application's user id).
On the 0-8..0-91 paths, every enqueued message gets its own
{{MessagePublishInfo}} referencing its own {{AMQShortString}} exchange and
routing keys. For some use-cases, these are drawn from a small set. On the
AMQP 1.0 path, {{Properties#to}} is an example. 0-10 is probably affected too.
This unnecessarily increases the heap requirements of the Broker.
The Broker should adopt a sensible intern/caching policy. Note that in AMQP
1.0, values which are {{Symbols}} are already interned.
> Heap dominated by duplicates of common routing values / header values etc
> -------------------------------------------------------------------------
>
> Key: QPID-7830
> URL: https://issues.apache.org/jira/browse/QPID-7830
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Reporter: Keith Wall
>
> When used for store and forwarding, in some use cases the Broker's heap can
> become dominated by duplicates of common values such as routing information
> (e.g. {{amq.direct}} or an application's queue name) or common header values
> (e.g a application/octet-stream or an application's user id).
> On the 0-8..0-91 paths, every enqueued message gets its own
> {{MessagePublishInfo}} referencing its own {{AMQShortString}} exchange and
> routing keys. For some use-cases, these are drawn from a small set. On the
> AMQP 1.0 path, {{Properties#to}} is an example. 0-10 is probably affected
> too.
> This unnecessarily increases the heap requirements of the Broker.
> The Broker should adopt a sensible intern/caching policy. Note that in AMQP
> 1.0, values which are {{Symbols}} have their underlying String automatically
> interned.
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