tcp_rmem value is too high, bad internet performance results

Bug #173126 reported by David Freitas
4
Affects Status Importance Assigned to Milestone
procps (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

1) On this topic, it seems that performance is poor:

Slow internet in Gutsy compared to Windows:
http://ubuntuforums.org/showthread.php?p=3853831

2) MAJOR ISSUE:
Also, it seems that some apps fail to operate correctly because the "/proc/sys/net/ipv4/tcp_rmem" value isn't setup correctly.
The default value in Ubuntu is: "4096 87380 4194304"
The third value's recommended value is 2x the second values'. [1]

It's described here in detail.
http://cpbotha.net/2007/10/21/running-mxit-in-mpowerplayer-on-linux-ubuntu-feisty-704/
But, basically an application fails to login properly with the default tcp_rmem value in Ubuntu.
But works perfectly when setting it to
sudo sysctl net.ipv4.tcp_rmem="4096 87380 174760"

This isn't the expected value for an application that relies on TCP.
Could it be the application that is doing something wrong, or are these settings just incorrect by default in Ubuntu Feisty?

/David
-------------
References
[1] http://www.psc.edu/networking/perf_tune.html

David Freitas (jddcef)
description: updated
Revision history for this message
Koen (koen-beek) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at [WWW] https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in procps.

Revision history for this message
Daniel T Chen (crimsun) wrote :

Is this symptom still reproducible in 8.10 (which uses an accepted-better TCP algorithm)?

Changed in procps:
status: New → Incomplete
Revision history for this message
David Freitas (jddcef) wrote :

Works now, thanks!
What is this "accepted-better TCP algorithm" ?

Revision history for this message
Victor Vargas (kamus) wrote :

This bug report is being closed due to your last comment regarding this being fixed with an update. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.

Changed in procps (Ubuntu):
status: Incomplete → Invalid
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