1
vote
2answers
271 views

Low latency TCP settings on Ubuntu

There is a server for measurements running on Ubuntu in my lab . And there is C program, which receives data through TCP connection and should as soon as possible send a reply. Network latency when ...
0
votes
1answer
248 views

rmem_max more than rmem_default

I just installed centos 6.3 freshly and noticed the following: [root@localhost user1]# cat /etc/redhat-release CentOS release 6.3 (Final) [root@localhost user1]# [root@localhost user1]# cat ...
1
vote
1answer
194 views

TCP RWIN, MSS and MTU [closed]

I have been doing some reading into TCP Receive Window (RWIN), Maximum Segment Size (MSS) and Maximum Transmission Unit (MTU). Right off the bat I have some questions and I need a power user's help! ...
1
vote
2answers
146 views

Visualize overloaded nic in linux (kernel time)?

I have a linux server that keeps getting its NIC overloaded and I need to visualize how and why this is occurring based on connections and CPU utilization. How do I do this? For example; for me to ...
1
vote
1answer
205 views

RRAS (Routing and Remote Access) change process priority to “realtime”?

I have a windows server 2012 running RRAS and some other services. Beacause of that I guess I have experience some slowdowns and dropout of package. My question is how to find, and change the ...
7
votes
3answers
446 views

Unexplained periodic humps in system CPU usage on W2K3E

We have a Windows 2003 R2 Enterprise 64-bit server running a custom workload suffering from an odd performance problem. The pared-down version below suffers from a smaller hump, but it's qualitatively ...
6
votes
1answer
4k views

Interpreting ethtool Coalesce output

Other than tx and rx being the transmit and recieve, can anyone explain what the fields mean in ethtool -c's (Coalescing output) and what effect they have on how coalescing works? Coalesce parameters ...
1
vote
2answers
133 views

How to connect an Oracle server between two countries and maintain high speeds for read & write

Our company has two branches, one in Malaysia and the other one in India. The problems occur when we try to share one of our Oracle environments to our branch in India; the connection is very slow, ...
6
votes
4answers
5k views

Windows 7 network performance tuning for LAN

I want to tune Windows 7 TCP stack for speed in a LAN environment. Bit of background info: I've got a Citrix XenServer set up with Windows 2008R2, Windows 7 and Debian Lenny with Citrix kernel, ...
3
votes
1answer
3k views

What is the best TCP congest algorithm to use for a mobile device?

Given the multitude of TCP algorithms available now and the rise of Linux based mobile devices, what are ideal algorithm(s) to consider? From reading of the various implementations, Veno and ...
6
votes
1answer
1k views

What are some TCP tuning tips for a service hit by iPhone clients on mobile networks like 3G?

I am a developer that has the good+bad situation of designing a network service that will be hit very hard by iPhone clients. The iPhone app has over 10MM downloads in the past year and now I'm ...
1
vote
2answers
511 views

How well does Windows 7 Handle High Bandwidth-Delay Product Networks

As WAN bandwidths increase default network settings in older operating systems are less and less able to efficiently use the network. A description of the problem with high bandwidth-delay product ...
1
vote
5answers
199 views

Network Monitoring and Filtering [closed]

As the IT administrator for my company I have been tasked with deciding what traffic to filter, shape, and othewise monitor on our network. What protocols, applications, and other network traffic do ...
0
votes
3answers
1k views

What program can I use to benchmark network traffic? [duplicate]

Possible Duplicate: How to test real network throughput between two points? Given two computers connected by some network interface, is there a standard tool used by an academics publishing ...