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Thread: Logout latency

  1. #1
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    Logout latency

    Hello,

    I have a problem on user logoff. we found that if we execute engine.changeStatus("DISCONNECTED") on web client,

    Code:
    engine.policy.setIdleTimeout(10);
    engine.changeStatus("DISCONNECTED");
    Lightstreamer server receive such acknowledge after 30 seconds.

    Code:
    16-Jun-08 16:27:50,432 |DEBUG|.metadata.TeletextMetadataAdapter|FOR PUMPS PARKING DESTROYER|notifySessionClose: session[S483511766N20] logged out
    Can we minimize the latency?

    Thanks!

  2. #2
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    You could want to work on the timeouts configuration to reduce time that passes between a stream connection physical close and the notifySessionClose() callback. Such time is mainly controlled by the session_timeout_millis element in lightstreamer_conf.xml. The reason for the existence of this timeout is to let a session survive content-length exhaustions and accept rebind connections. This timeout should just consider network latency and client slowness. Recently, we reduced its default value to 5 seconds, but you could reduce it even more if you want to get a more precise presence tracking.

  3. #3
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    Thanks! session_timeout_millis elements can shortens timeout latency.

    Instead of timeout, Does Lightstreamer support logout function? Can Ligthtstreamer server receive notifySessionClose() callback immediate when Web client execute engine.changeStatus("DISCONNECTED") ?

  4. #4
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    At present, notifySessionClose() is only called after the timeout. In a future version of Lightstreamer we will probably change this behavior.

 

 

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