Why windows 2000 is slow dowloading from Apache 8.1 webserver

[Tadeusz]

I am trying to download sameple file from weblogic web server 8.1. And
I found windows 2000 is very slow.

I tested download speed using windows 2000, windows XP, and windows
nt4 workstation.
To test workstations were connected to same jack in the network, so I
think network is not an issue.

Windows Xp and NT can download this file with average ~600KB/sec, but
windows 2000 can only achieve 30KB/sec. It is 20 times slower

I have this problem with all windows 2000 workstations and only when
connected to Weblogic server. When I am trying to download same file
form apache sever it goes fine with ~600KB sec. All my webservers I am
testing with are setup on AIX 5.2. Windows 2000 PC works fine when
connected to internet.

I have traced today packets that are being exchanged between
window2000 workstation and each of webservers. Base on my finding I
see
Following pattern when downloading form Weblogic 8.1

source dest length summary time
WLS workstation 1514 ACK 14.00.00.00
WLS workstation 1514 ACK 14.00.00.00
workstation WLS 66 ACK 14.00.00.00
WLS workstation 1242 PSH ACK 14:00.00.00
workstation WLS 66 ACK 14:00.00.160
WLS workstation 1514 ACK 14:00.00.160
WLS workstation 1514 ACK 14:00.00.160
workstation WLS 66 ACK 14:00.00.160
WLS workstation 1242 PSH ACK 14:00.00.160
workstation WLS 66 ACK 14:00.00.300
WLS workstation 1514 ACK 14:00.00.300
WLS workstation 1514 ACK 14:00.00.300
workstation WLS 66 ACK 14:00.00.300
WLS workstation 1242 PSH ACK 14:00.00.300
workstation WLS 66 ACK 14:00.00.480

but when tracing download from Apache I have
no delays download is very fast (~600 packes a sec)and pattern is

source dest length
WLS workstation 1514
WLS workstation 1514
workstation WLS 66
WLS workstation 1514
WLS workstation 1514
workstation WLS 66

So I see WLS sends 2 regular packets, workstation acknowledge them,
than WLS sends only one packed of size 1242 and than nothing happen,
Workstation waits ~200ms and sends acknowledge to WLS and at that
point WLS sends 2 reg packet and process repeat itself. I found how
can I reduce this wait to ~100ms on workstation by changing registry,
but that is not solution for my problem. Does any one have any
suggestions what is wrong here and how can I fix it on server or
workstation level.
Thank you,

 

[tadeuszk]

Sorry I forgot to add
Test results are the same when using Netscape or IE. So it is not a
browser issue
I made many changes in registry to improve speed but nothing helped.