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Questions tagged [latency]

Latency is the time period between a signal being sent and a signal being received

Latency is the time period between a signal being sent and a signal being received. In computer networking this can be the time between a sending of a packet and receiving of a packet.

To illustrate we can use the ping command:

PING google.be (173.194.66.94) 56(84) bytes of data.
64 bytes from google.be (173.194.66.94): icmp_req=1 ttl=47 time=76.6 ms
64 bytes from google.be (173.194.66.94): icmp_req=2 ttl=47 time=74.8 ms
64 bytes from google.be (173.194.66.94): icmp_req=3 ttl=47 time=79.6 ms

The latency here is 76.6 ms.

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Hunting for performance-reducing issues on a high-usage server

I host a server through the Google Compute Engine for various purposes, most notably a Minecraft server, and it receives a lot of traffic and usage. We're talking fairly constant CPU usage at 150%, 50 read/10 write per second to disk, and 600…
Addison Crump
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Measure latency using ping from a 3rd server

I am new to networking and I wanted this kind of environment. is there any way to measure network latency using ping between two hosts, given the condition you are not logged into either of the hosts? I.e you are in a 3rd host and you wanna measure…
sush
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Can high server's CPU usage cause high ping for clients?

Some users have high ping and they cannot play my multiplayer game due to it. My server application is causing CPU to always rise little by little and when I restart it, it drops. I am working on fixing it, but wondering now, can CPU usage be…
Gintas_
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How do I reduce private network latency below 0.5ms?

We are migrating from one host to another. Our cluster consists of 10 dedicated linux servers which must communicate on a private network. At the old host we observed latencies below 0.2ms between our servers on their private interfaces, but on the…
tom_nb_ny
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Is it Possible to Configure Receive-Side Scaling on an EC2 Instance Running Windows Server 2012 R2

Currently, I am experiencing some problems on getting a server to run efficiently on an EC2 instance. On my local machine everything runs as expected, but on AWS the servers experience some latency, 30ms on servers connected locally to each other,…
Jesse
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Is connect time all because of latency issue?

Server Question: I have been working on to increase speed of website of https://www.winni.in and I have came across a very strange phenomena. If anyone could, please explain about this. I was comparing load time of Winni and Snapdeal, and found out…
Abhinav
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What is an efficient means to serve a dynamic website globally, in terms of latency?

We're using Amazon's AWS infrastructure. At one time, we did have a load-balanced setup across geographic regions, and our database cluster was divided between those regions. To reduce costs for the time being, and to solve some clustering issues we…
Ian Atkin
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Long latency on Windows/IIS virtual hosts

We have a development server on which we have about 10 identical virtual sites. Whenever we pull up one of the sites, it is very slow (up to 30 seconds for the login page to show up). Once logged in, the application is significantly faster although…
royappa
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Sometimes unable to tune Linux TCP stack for improved high-latency performance

I have been unsuccessfully trying to apply the TCP Tuning techniques discussed at http://fasterdata.es.net/host-tuning/ As you'll see when you read through the entire question, sometimes the es.net tuning guidelines are effective for me, other times…
Bryan Pendleton
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monitor and log speed of a program working with network files

We are using a CAD program on multiple computers in a network. All files and projects are stored on a network storage. The users moan about long waiting times while opening from and saving to the network. We (IT department) assume other issues than…
Lonely Island
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Ubuntu Trusty: virt-manager performance over WAN... 40+ secs freezes

I'm using the virt-manager GUI 0.9.5-1ubuntu3 on my laptop running Ubuntu 14.04 against a server located some distance away (same OS) and getting rather unpleasant performance. Laptop-server pings are ~50ms, not great but certainly sufficient for…
sxc731
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How to reduce latency?

I am looking to build something where you can have a workstation/server in one location, and access it remotely using a video stream of the screen to do as you wish. My reason for wanting low latency is I want to make it possible to say game on it.…
Josh Kirby
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Getting chunks of high ms when pinging local / external IP addresses?

I am having difficulty identifying what a specific problem with one of your vlaned networks. They have a voip phone which regularly cuts out during long phone calls. I have done several ping tests from both the phone and directly into the ethernet…
Baz
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Windows Azure VHD Upload Inconsistencies

I'm a little over 2 days deep into a 5 day .vhd upload using the Add-AzureVHD in Windows Azure Powershell and I'm perplexed to the speed (or lack thereof) of this operation. The .vhd is a 300GB file hosted on a SAN (iSCSI) and every part of this…
pk.
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how to choose right SFP 1000BASE-T transceiver?

I want to connect SFN7122F network card to 1000BASE-T (1 GB cooper Ethernet). I've found a lot of transceiver and I don't understand how should I choose…
Oleg Vazhnev
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