Nagle's algorithm: Difference between revisions

Revision as of 16:17, 10 July 2016

Revision as of 16:23, 10 July 2016

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where ''MSS = [[maximum segment size]]'' and ''window size = [[TCP tuningcongestion control|TCP Receivecongestion Windowwindow]]''.

This algorithm interacts badly with [[TCP delayed acknowledgment]]s, a feature introduced into TCP at roughly the same time in the early 1980s, but by a different group. With both algorithms enabled, applications that do two successive writes to a TCP connection, followed by a read that will not be fulfilled until after the data from the second write has reached the destination, experience a constant delay of up to 500 milliseconds, the "[[ACK (TCP)|ACK]] delay". For this reason, TCP implementations usually provide applications with an interface to disable the Nagle algorithm. This is typically called the <code>TCP_NODELAY</code> option.