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Vista: Slow Network Performance

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Vista: Slow Network Performance

Postby chicagotech » Sat Mar 31, 2007 11:26 am

I had terrible performance copying files at first, I upgraded to
gigabit and initially that had little effect - after about a week,
mysteriously, the situation improved immensly - Vista had indexed all
of the files on all of our network drives and our performance tripled
after the indexing was complete. Go to control panel/performance/ and
look at the options on the left, one of them refers to indexing, I see
that my first Vista box indexed about 50,000 files on remote drives -
after it completed that task, it seemed like the network copy speed
improved dramatically. The benefit is that file searches on network
drives are lightning fast. I'm not 100% positive if the indexing
caused the problem, but it sure seems that it works well now - our
network drives are on a Server 2003 file servers.
Dan


I am curious if anyone else is experience extremely slow network performance
when attempting to copy files between either another Vista Desktop or a
Windows 2003 Server?

I actually get faster speeds downloading files off of the Internet! This
really doesn't make any sense to me. I get the same result from both my
office and home network environments.

At home I'm connected Wireless and at the Office connected via Wire. In
both cases I get the same result!

If anyone else has figured out a fix for this please let me know as I'd be
very interested in figuring out what to do about it!
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Postby chicagotech » Wed Aug 08, 2007 11:09 am

This update may help too,

An update is available that improves the performance and reliability of Windows Vista
http://support.microsoft.com:80/?kbid=938979
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Postby chicagotech » Fri Oct 12, 2007 8:00 am

Also check this link.

Vista Slow Issues
Vista business slow accessing domain resources ... I have a mix of machines running on an SBS domain. (XP, Mac, and Vista > > business) Two are Vista . ...
www.chicagotech.net/vista/vistaslow.htm
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
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Postby guest » Tue Apr 08, 2008 3:14 pm

You have encountered a slow performance while attempting to copy files
from a Vista laptop to a HP business notebook. If I have misunderstood
about your concern, feel free to let me know.

Before moving on, I would like to confirm the following information:

Does performance improve when copying files via the command line as opposed
to Windows Explorer interface? File copies via the command line use the SMB
protocol and the redirector component while file copies through the GUI use
the redirector and the shell components.

If the file copy is also slow from the command line, please take the
following steps to do the troubleshooting:

Step 1: Check the Network Adapter
==================================================
1. Update the Network Adapter to the latest driver from the manufacturer.
NOTE: Although this is a simple step, this has fixed a large number of slow
file copy cases.
2. Go to Device Manager -> Right click on the Network Adapter -> Properties
-> Advanced, please temporarily disable TCP and IP checksum offloading.
This will cause this processing to be handled by Windows TCPIP stack
instead of the Network card.
3. Set the Network Card and Switch from Autodetect to a hard coded link
speed such as 100mb/half duplex.

Step 2: Add the CopyFileBufferedSynchronousIo registry entry
==============================================
1. Click Start, type regedit in the Start Search box, and then press
ENTER.
2. Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System

3. On the Edit menu, point to New, and then click DWORD Value.
4. Type CopyFileBufferedSynchronousIo to name the new entry, and then
press ENTER.
5. Right-click CopyFileBufferedSynchronousIo, and then click Modify.
6. In the Value data box, type 1 , and then click OK.
7. Exit Registry Editor

Step 3: Adjust the MTU settings for VPN connection:
==============================================
a. On Vista notebook, please try to ping the File Server (laptop) site with
the following command:

ping 192.168.0.7 -f -l 1472 (replace 192.168.0.7 with the IP of the File
server laptop)

Will you receive the following response?

Reply from 192.168.0.7: bytes=1472 time=74ms TTL=58

b. If you receive a negative response, please try to ping with reduced
packet size of 10 (1462), will the ping work?
c. Repeat step b using a smaller MTU size. Repeat this process to check if
the ping command will succeed.
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Troubleshooting Vista Wireless
http://chicagotech.net/
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Postby chicagotech » Sun Oct 05, 2008 8:22 am

I have suffered the same problem and tried everything listed on the web
with no success. I then discovered that I could fix this problem by
changing the connection speed of my network card from fixed 100Mbps full
duplex to auto it sill connects at 100Mbps but the network transfer rate
has gone from 130KB/s to 8MB/s in short a file that took 20 minutes to
transfer now takes 17 seconds.
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How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
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