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TCP/IP send getting slower

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Old 05-22-2003
TCP/IP send getting slower
Hi,
We have developed a server program using TCP/IP Communication to communicate with another client program. After running for some days we find the TCP/IP connection from the server program is getting slower ie, the messages are not send quickly to the client.

What i mean to say is since the tcp/ip send() function in the server program is in the blocked mode, we suspect the reason for the slowness in sending the message to the client program could be because of the TCP buffer (in the server)getting full and the clients failure to pull the messages from the buffer in time.All these has being coded in a posix thread. Once the buffer is full, the send() function is blocked until the client pulls some messages from the buffer, the send() doesn't return.

We have been perplexed by this problem for quite a long time. we intially though it could be the network problem..but the network is 100Mbs..

The hardware used is sun solaris machine..

I will be very grateful if some one can advice us in finding a solution for this problem.
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LEARN ABOUT DEBIAN

tcplisten

TCPCONNECT(1)						      General Commands Manual						     TCPCONNECT(1)

NAME

       tcplisten - general TCP/IP server

SYNOPSIS

       tcplisten [-irv] [localaddr] port

DESCRIPTION

       tcplisten  waits  for  a  TCP/IP connection on port.  If a localaddr parameter is given, tcplisten will bind to that IP address.  Otherwise
       tcplisten will accept connections to any of the local machines IP addresses.  Data received from the client is printed on standard  output,
       and  data  read	from  standard input is sent to the client.  When end-of-file is reached on both standard input and the TCP/IP connection,
       tcplisten terminates.

OPTIONS

       -i     Terminate at end-of-file on standard input; don't wait for the client to close the connection.

       -r     Terminate when the remote client closes the connection; don't wait for end-of-file on standard input.

       -v     Verbose mode.  Prints a message to standard error about the origins (host and port) of the client.

SEE ALSO

       tcpconnect(1), telnet(1), mini-inetd(1), tcpbug(1).

BUGS

       The names of the options are not yet finalized, and may change at a future release.

								   1997 April 13						     TCPCONNECT(1)