RE: Half the speed migrating from Windows 2000 to Windows 2003
- From: Kesney <Kesney@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 7 May 2008 04:51:00 -0700
Is your client and server applications separated by a WAN network or a LAN
network? By using Wireshark network sniffer, you might be able to see how
the slow transmission is being transferred, specially by looking at the
graphics that it creates to analyze the data transfer (number of pakets per
second and number of bytes per second) No body has been able to identify the
root cause of this issue after 5 months of painstaking troubleshooting.
Microsoft was not helpful with this issue even though the issue only manifest
itself on win2k3/win2k8 and not on XP. Do you have an application buffer
size that you fill up in order to write to the wire or transmit it? What is
the size of that buffer size? You might want to increase it to 64k to
identify whether it makes a difference for you. you can contact me directly
if you would like to chat in more details about this issue (kesney at
gmail.com)
"redblue" wrote:
A long time ago I had written a very simple server that uses AcceptEx,.
TransmitFile and IOCPs. It works fine on all versions of NT. Today,
out of curiosity, I ran the server on a virgin Windows 2003 Server
(with sp2) machine and was surprised to see that its performance was
less than half that of the same machine running virgin Windows 2000
Server (with sp4). On w2k, my server gives a speed of ~6700 responses
per second (rps) as opposed to ~3000 rps on the W2k3 machine.
The test configuration:
1.6 G Pentium, 1G RAM. 1000BT ethernet.
Each request/response pair is about 100 bytes each. The socket is
closed after each response.
I have not been able to figure out what could be the reason why such a
drastic drop in performance from an OS that is marketed as given
better performance than its predecessor. I would be grateful if
someone knew the answer offhand.
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