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Posted to dev@qpid.apache.org by "Ken Giusti (Jira)" <ji...@apache.org> on 2019/10/11 14:35:00 UTC
[jira] [Updated] (DISPATCH-1135) Router A leaks memory when router
B killed and restarted.
[ https://issues.apache.org/jira/browse/DISPATCH-1135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ken Giusti updated DISPATCH-1135:
---------------------------------
Labels: memory-bug (was: )
> Router A leaks memory when router B killed and restarted.
> ---------------------------------------------------------
>
> Key: DISPATCH-1135
> URL: https://issues.apache.org/jira/browse/DISPATCH-1135
> Project: Qpid Dispatch
> Issue Type: Bug
> Reporter: Michael Goulish
> Priority: Major
> Labels: memory-bug
>
> I set up a 2-node router network, with B connecting to A.
> No clients.
> Repeatedly killing and restarting B – giving 3 seconds after each kill and after each restart for the network to settle down. Repeated 100 times. The same router A ran for the duration of the test.
> The 'ps' program, run repeatedly on router A, indicated that it was leaking about 82 KB per kill-and-restart. Using 'qdstat m' on A after each kill-and-restart showed the following difference between iteration 1 and iteration 100. ( Note, this shows growth of only 44 KB per iteration. )
>
> As far as I looked into the past (about 1 year) I saw similar behavior.
>
> In the chart below, the first column "size" is the number of bytes in a single struct of that type.
> "In-threads" means how many of each struct are currently being used.
>
> Note that, although there are no clients, the routers will be sending some messages to each other.
>
>
> {{type size in-threads in-threads item byte}}
> {{ test 1 test 100 growth growth}}
> {{ ======================================================================}}
> {{qd_buffer_t 536 256 2944 2688 1440768}}
> {{ qd_message_content_t 1056 128 1216 1088 1148928}}
> {{ qd_iterator_t 160 448 7488 7040 1126400}}
> {{ qd_parsed_field_t 88 256 2880 2624 230912}}
> {{ qdr_delivery_t 248 256 1152 896 222208}}
> {{ qd_message_t 160 256 1088 832 133120}}
> {{ qd_connection_t 2320 32 64 32 74240}}
> {{ qdr_general_work_t 64 64 448 384 24576}}
> {{ qdr_link_t 360 192 256 64 23040}}
> {{ qd_bitmask_t 24 192 1088 896 21504}}
> {{ qdr_connection_work_t 48 64 384 320 15360}}
> {{ qdr_link_work_t 48 64 384 320 15360}}
> {{ qd_link_t 96 128 256 128 12288}}
> {{ qdr_link_ref_t 24 64 448 384 9216}}
> {{ qd_parsed_turbo_t 64 128 256 128 8192}}
> {{ qd_link_ref_t 24 64 256 192 4608}}
> {{ qdr_error_t 24 64 256 192 4608}}
> {{ qd_deferred_call_t 32 64 192 128 4096}}
> {{ qdr_terminus_t 64 192 256 64 4096}}
> {{ qdr_delivery_ref_t 24 64 128 64 1536}}
>
> ( All other structs have zero growth. (Or, in one case, less.) )
>
>
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