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Changes between Version 5 and Version 6 of SessionInfo

08/28/14 09:52:29 (7 years ago)
Antoine Martin



  • SessionInfo

    v5 v6  
    4040You can see a screenshot [/attachment/wiki/SessionInfo/session-info-connection.png here]
     43{{{#!div class="box"
     44= Statistics =
     46The statistics pane shows various latency and quality data from the server, it can be used to monitor how well the system is self tuning to adapt to the network conditions:
     47* {{{Server Latency (ms)}}}: this is a measure of how long it takes for:
     48 * the client to send a "ping" packet
     49 * the server to receive it, process it and send the "echo" response
     50 * the client to process the response and calculate the latency
     51 It is very different from an [http://en.wikipedia.org/wiki/Ping_(networking_utility) ICMP Ping] because it includes on both ends: the full operating system network stack, the operating system scheduler, the Python interpreter with its threads and locking, TCP re-transmits. On a busy system, this value may well go up as other packets are ahead of the send queue at either end. A modern CPU should be able to keep this value around 50ms plus the TCP connection latency (TCP packet drops can cause this value to increase more dramatically).
     53You can see a screenshot [/attachment/wiki/SessionInfo/session-info-statistics.png here]