Silly Window Syndrome





[[See [Stevens], volume 1]]

Commonly exhibited by NT4 TCP client stack when sending bulk data.

From a mailing list:  "The work-around was to change the tcp_deferred_ack_interval parameter in
Solaris 8; this parameter indicates the delay in milliseconds before
sending a deferred ACK (the default for windows is 200ms, for Solaris 8 is
100 ms and for most linux distributions 50ms; I set it to 10ms and the file
uploads are 10 times faster!).

I believe the new low value of 10ms is OK for LANs (where RTT for TCP
packets are less than 10ms) but it may not work for WANs."

File uploads to [AOLserver], [tclhttpd], ... can exhibit this.