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https://issues.apache.org/jira/browse/PROTON-1170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Ross updated PROTON-1170:
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Labels: leak perf (was: leak)
> closed links are never deleted
> ------------------------------
>
> Key: PROTON-1170
> URL: https://issues.apache.org/jira/browse/PROTON-1170
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Environment: miserable
> Reporter: michael goulish
> Labels: leak, perf
> Fix For: 0.17.0
>
>
> I wrote a reactor-based application that makes a single connection, and then
> repeatedly makes-and-closes links (receivers) on that connection.
> It makes and closes the links as fast as possible: as soon as it gets the
> on_receiver_close event, it makes a new one. As soon as it gets the
> on_receiver_open event -- it closes that receiver.
> This application talks to a dispatch router.
> Problem: Both the router and my application grow their memory (RSS) rapidly
> -- and the router's ability to respond to new link creations slows down
> rapidly. Looking at the router with Valgrind/Callgrind, after about 15,000
> links have been created and closed I see that 45% of all CPU time on the
> router is being consumed by pn_find_link(). Instrumenting that code, I see
> that the list it is looking at never decreases in size.
> I tried creating my links with the "lifetime_policy" set to DELETE_ON_CLOSE,
> but that had no effect. Grepping for that symbol, I see that it does not
> occur in the proton C code except in its definition, and in a printing
> convenience function.
> Major scalability bug.
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