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https://issues.apache.org/jira/browse/QPID-3316?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gordon Sim closed QPID-3316.
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Resolution: Duplicate
https://issues.apache.org/jira/browse/QPID-4339 tracks a paged queue
implementation
> flow-to-disk limit policy does not flow the whole message to disk
> -----------------------------------------------------------------
>
> Key: QPID-3316
> URL: https://issues.apache.org/jira/browse/QPID-3316
> Project: Qpid
> Issue Type: Improvement
> Components: C++ Broker
> Affects Versions: 0.8, 0.9, 0.10
> Reporter: Sergey Zhemzhitsky
> Labels: flow-to-disk, limit-policy, qpid
>
> Here is part of the mailing list
> Hi there,
> I'm using qpid 0.8 and I'm trying to configure queue to use the limit-policy
> parameter without luck.
> Here is the command to create a queue
> qpid-config add queue myQueue --durable --file-size=256
> --file-count=96 --max-queue-count=100 --limit-policy=flow-to-disk
> Here is output of the top command after qpid starts
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 28146 qpidd 19 0 123m 5596 4104 S 0.0 0.3 0:00.00 qpidd
> As you can see it uses ~5.6mb of memory.
> After I start to send non-persistent messages (size of each message is 32
> bytes) without consumption the output of the top command is the following:
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 28146 qpidd 16 0 2541m 1.8g 3520 S 49.0 94.1 0:41.75 qpidd
> Now qpid consumes 1.8Gb and it continues to consume more.
> I'm wondering why so? How to make the queue to use the limit-policy
> parameter correctly?
> Here is the answer from Gordon Sim:
> That policy allows the body of the message to be released from memory, but
> the headers etc will still be held in memory. For small messages (such as the
> 32 byte message you are sending), this policy will not really do anything
> useful.
> Your use case really requires a proper paging solution which qpidd does not
> yet support.
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