Re: Winsock2 accept queue depth

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Arkady Frenkel (arkadyf_at_hotmailxdotxcom)
Date: 11/30/04

  • Next message: DBard: "C - resolving IP" 
    Date: Tue, 30 Nov 2004 22:02:28 +0200

    Steve , just be aware that backlog is stack of not yet accepted connections
    on server ( between listen() and accept() , but number of accepted (
    established ) sockets limited only by memory resources and only in 9x that
    limited to 100
    Arkady

    "Alun Jones [MSFT]" <alunj@online.microsoft.com> wrote in message
    news:u48HiFw1EHA.2112@TK2MSFTNGP15.phx.gbl...
    > "Steve Tassio" <SteveTassio@discussions.microsoft.com> wrote in message
    > news:F7C44AE1-D480-400D-BE3E-5552F3384742@microsoft.com...
    > > For a long time SOMAXCONN = 5. In Winsock2.h its defined as 0x7fffffff.
    I
    > > have a listening socket in a thread to accept connections to an array of
    > > working sockets that run in their own threads. Using XP SP1, .NET 2003,
    > > MFC
    > > C++. I found SOMAXCONN to still be = 5. I dragged Winsock2.h and
    > > WS2_32.lib
    > > from the Feb 04 Platform SDK into my project and still find SOMAXCONN =
    5.
    > > I
    > > tried this -
    > > #define SOMAXCONN 0x7fffffff
    > > but my symptoms don't go away. They are, if I try to spawn over 70
    threads
    > > that connect to the accept socket I get many of this error -
    > > WSAECONNREFUSED - 10061
    > > The socket array has 200 available sockets and each thread is probably
    > > active about 120ms only. Ultimately I need to sustain 250 simultaneous
    > > connections. Is there a work around for this? Thank you!
    >
    > Workstation-class operating systems are limited to a backlog of 5,
    > server-class operating systems (Windows 2003 Server, Windows Server 2000,
    > Windows NT 4 Server, etc) have different limits on the backlog.
    >
    > Alun.
    > ~~~~
    >
    >

  • Next message: DBard: "C - resolving IP"

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