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Old 2016-10-19, 11:46   #1
pinhodecarlos
 
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"Carlos Pinho"
Oct 2011
Milton Keynes, UK

712 Posts
Default Slow Transfer Speeds with Windows 7

Finally today I've decided to search for the slow transfer speed issue I've had in my laptop since I bought it while downloading the NFS data for the post-processing. My speed was always limited to 1.5 MB/s but not when using torrent or emule. This has been my complain since I started using this laptop and today I've made a test with my wife's laptop and download speed reached connection limit of 10 MB/s!!! So I thought, what's going on here?!

Anyway, this wasn't a real issue because I've been always downloading data at night in parallel with the previous post-processing but this was trigging me.

After as few searches on the web I found this page:

https://hightail.zendesk.com/hc/en-u...with-Windows-7

Basically I had ''TCP Window Scaling heuristics'' enable.

So to all to check if your connection is been restricted follow these steps:

Code:
To view current settings, open command prompt and use the "netsh  interface tcp show global" and "netsh interface tcp show heuristics"  commands.  C:\Users\Administrator>netsh interface tcp show global
Querying active state...

TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State          : enabled
Chimney Offload State               : automatic
NetDMA State                        : enabled
Direct Cache Acess (DCA)            : disabled
Receive Window Auto-Tuning Level    : normal
Add-On Congestion Control Provider  : ctcp
ECN Capability                      : enabled
RFC 1323 Timestamps                 : disabled
 C:\Users\Administrator>netsh interface tcp show heuristics
TCP Window Scaling heuristics Parameters
----------------------------------------------
Window Scaling heuristics         : disabled
Qualifying Destination Threshold  : 3
Profile type unknown              : normal
Profile type public               : normal
Profile type private              : normal
Profile type domain               : normal
 If the settings do not match above, enter these commands as Administrator, and then restart the download or upload.
 netsh interface tcp set global autotuninglevel=normal
 netsh interface tcp set heuristics disabled
Just thought sharing this to all Windows 7 users if you ever come through this issue, not sure if it applies to Windows 10.

Carlos

Last fiddled with by pinhodecarlos on 2016-10-19 at 11:59
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Old 2016-10-19, 13:50   #2
retina
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"The unspeakable one"
Jun 2006
My evil lair

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I assume these heuristics are to leave space in the pipe for higher priority data streams (whatever MS decide they might be). So I guess MS will favour Skype, IE, Edge and the other MS properties; and downgrade other non-approved apps that people actually like more? [/cynicism]
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Old 2016-10-19, 19:52   #3
kladner
 
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"Kieren"
Jul 2011
In My Own Galaxy!

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Funny, I am not getting the second part of the response for:
netsh interface tcp show global

I only see
TCP Global Parameters


Oops. Did not see the second command line.

Last fiddled with by kladner on 2016-10-19 at 19:54
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