[AXISCPP-749] Currently TCP_NODELAY is turned off. This is only efficient when the messages are small.

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Won't Fix
• Affects Version/s: current (nightly)
• Component/s: Transport (axis3), Transport (Client)
• Environment: n/a
• Assignee: Unassigned
• Reporter: Fred Preston
• Created: 19/Jul/05 00:51
• Updated: 19/Jan/08 00:43
• Resolved: 19/Jan/08 00:43

Description

When setting up the socket, the following initialisation is performed (see the last few lines of method HTTPChannel::OpenChannel() and HTTPSSLChannel::OpenChannel())...

/* Turn off the Nagle algorithm - Patch by Steve Hardy */

/* This is needed, because our TCP stack would otherwise wait at most

• 200 ms before actually sending data to the server (while waiting for
• a full packet). This limits performance to around 5 requests per
• second, which is not acceptable. Turning off the Nagle algorithm
• allows for much faster transmission of small packets, but may
• degrade high-bandwidth transmissions.
  */

int one = 1;

setsockopt( m_Sock, IPPROTO_TCP, TCP_NODELAY, (char *) &one, sizeof( int));

When the message is not so small, does this omission degrade the socket performance? Would it be better to set a threshold and perhaps change the socket options 'on the fly' when the message size dictates that it should be handled differently?