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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-7830) Heap dominated by duplicates of common routing values / header values etc
Date Mon, 07 May 2018 16:32:00 GMT

    [ https://issues.apache.org/jira/browse/QPID-7830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16466107#comment-16466107
] 

ASF subversion and git services commented on QPID-7830:
-------------------------------------------------------

Commit 5b6dfcd94ef64544040de53d38e2463d327ebcb1 in qpid-broker-j's branch refs/heads/master
from [~alex.rufous]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-broker-j.git;h=5b6dfcd ]

QPID-7830: [Broker-J] Cache encoded and decoded values for 0-10 str8


> 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: Broker-J
>            Reporter: Keith Wall
>            Priority: Major
>             Fix For: Future
>
>
> 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 with the same policy applying
regardless of whether messages follow the on-line enqueue or recovery path.  Note that in
AMQP 1.0, values which are {{Symbols}} have their underlying String automatically interned.



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