As an observer, I have to wonder what the heck happened in the design, development and testing of 5.4.
If you can't do a trace, a cheap substitute is to sample what's going on with Query SEssion. and Select * From Sessions. The Select is helpful in showing data progress down to the byte level, plus the in progress verb, for a better sense of what's going on. The session state can help identify where the delay is. You might try an artificial test, with a single, very large file, then a large set of small files, to see if basic transmission speed or transaction rate is the problem. A foul-up in TCP Window Size could be the impediment. If you have the time, try a few different key settings and see if an affector stands out. Richard Sims