Slow Transfer Speeds with Windows 7

pinhodecarlos · 2016-10-19, 11:46

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

retina · 2016-10-19, 13:50

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]

kladner · 2016-10-19, 19:52

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.

2016-10-19, 11:46	#1
pinhodecarlos "Carlos Pinho" Oct 2011 Milton Keynes, UK 3×41² Posts	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

2016-10-19, 19:52	#3
kladner "Kieren" Jul 2011 In My Own Galaxy! 27AE₁₆ Posts	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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2016-10-19, 13:50	#2
retina Undefined "The unspeakable one" Jun 2006 My evil lair 23×283 Posts	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]