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tcp communication latency - Sun Solaris

Some of our users are complaining about the latency they are experiencing and the service they are getting from an application server. The app server is on one server that is on the same network as the second server that the users are using. I checked most things on both servers that would cause late response from a server, such the load average (uptime and top), status of vm (vmstat), disk i/o iostat and status of network interface (netstat) and everything looks good, very low load average, almost no swapping - some paging, and no network errors and almost no ...

  1. #1

    Default tcp communication latency

    Some of our users are complaining about the latency they are
    experiencing and the service they are getting from an application
    server. The app server is on one server that is on the same network
    as the second server that the users are using. I
    checked most things on both servers that would cause late response
    from a server, such the load average (uptime and top), status of
    vm (vmstat), disk i/o iostat and status of network interface (netstat)
    and everything looks good, very low load average, almost no swapping -
    some paging, and no network errors and almost no collision.

    What else can I check on the system/network level, without going to
    the application level for now? What about on tcp level since the
    application uses tcp to communicate.
    Lisa Guest

  2. #2

    Default Re: tcp communication latency

    On Thu, 09 Oct 2003 06:37:57 -0700, Lisa Koma wrote:

    Are we talking 10ms or 10s latency?

    /Ant
    Anthony Guest

  3. #3

    Default Re: tcp communication latency

    com (Lisa Koma) writes: 

    First, understand the symptoms.

    How much delay are the users complaining about? (e.g. "I click the
    button and wait 10 seconds to get the next screenful.")

    When does the delay occur? (e.g. "Only when I first start using
    the server." or "Only when I use certain menus." or "The whole
    time I use the server.")

    What is the client doing with the server at the time(s) the delay
    occurs? Is it making a connection to the server? Has it sent a
    database search command and is waiting for the reply?

    Do the application's logfiles on the server show anything during
    the times a client is experiencing slowness? Can you turn on
    logging on the client to reveal what it's doing?

    -Greg
    --
    Do NOT reply via e-mail.
    Reply in the newsgroup.
    Greg Guest

  4. #4

    Default Re: tcp communication latency

    I doubt it be caused by settings of resolvers. If ever DNS chosen to resolve
    the hostname but actually your application server has no record in, you
    application would definitely suffer.
    "Lisa Koma" <com> ????
    news:google.com... 


    Sting Guest

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