Brendan Gregg

SEPTEMBER 5, 2017

Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist. Tracing ZFS operation latency. At my employer we sometimes use SR-IOV for direct network interface access, and NVMe for direct disk access. Hit Ctrl-C to end. ^C

Virtualization 75

Virtualization AWS Engineering Hardware 75

Sutter's Mill

FEBRUARY 13, 2017

Tue-Thu Apr 25-27: High-Performance and Low-Latency C++ (Stockholm). On April 25-27, I’ll be in Stockholm (Kista) giving a three-day seminar on “High-Performance and Low-Latency C++.” If you’re interested in attending, please check out the links, and I look forward to meeting and re-meeting many of you there.

Latency 48

Latency C++ Hardware Performance 48

Scalegrid

AUGUST 27, 2024

RabbitMQ excels at managing asynchronous processing and reducing latency while distributing workloads effectively across the system. By prioritizing such messages, RabbitMQ delivers notifications with minimal latency, thus improving the user experience while sustaining the efficacy of communication systems. RabbitMQ in Action.

IoT 130

IoT Ecommerce Games Scalability 130

All Things Distributed

SEPTEMBER 25, 2017

This Region will consist of three Availability Zones at launch, and it will provide even lower latency to users across the Middle East. I'm also excited to announce today that we are launching an AWS Edge Network Location in the United Arab Emirates (UAE) in the first quarter of 2018.

Cloud 117

Cloud Education Energy Government 117

All Things Distributed

DECEMBER 12, 2018

In April 2017, Amazon Web Services announced that it would launch a new AWS infrastructure region Region in Sweden. They can run applications in Sweden, serve end users across the Nordics with lower latency, and leverage advanced technologies such as containers, serverless computing, and more.

AWS 119

AWS Cloud Games Serverless 119

Alex Russell

JANUARY 30, 2024

It's time once again to update our priors regarding the global device and network situation. seconds on the target device and network profile, consuming 120KiB of critical path resources to become interactive, only 8KiB of which is script. What's changed since last year? and 75KiB of JavaScript. These are generous targets.

Performance 98

Performance Network Mobile Speed 98

Adrian Cockcroft

JANUARY 29, 2023

The mean and percentile measurements hide this structure, but the rest of this post will show how the structure can be measured and analyzed so that you can figure out a useful model of your system, understand what is driving the long tail of latencies and come up with better SLAs and measures of capacity.

Lambda 98

Lambda Latency Cache C++ 98

All Things Distributed

OCTOBER 2, 2017

In support of Amazon Prime Day 2017, the biggest day in Amazon retail history, DynamoDB served over 12.9 VPC Endpoints give you the ability to control whether network traffic between your application and DynamoDB traverses the public Internet or stays within your virtual private cloud. million requests per second.

Internet 110

Internet Internet AWS Performance 110

Brendan Gregg

AUGUST 8, 2017

90491 N|rnberg (Germany) Consulting+Networking+Programming+etc'ing 42. rc5-virtual (bgregg-xenial-bpf-i-0b7296777a2585be1) 08/01/2017 _x86_64_ (8 CPU) 10:15:51 PM UID PID %usr %system %guest %CPU CPU Command 10:16:51 PM 0 18468 2.85 Network I/O? Latency was acceptable and no one complained. 3 tar termb$ iostat -x 60. [.]

Latency 111

Latency Metrics C++ Systems 111

Brendan Gregg

JULY 4, 2021

AWS Graviton2); for memory with the arrival of DDR5 and High Bandwidth Memory (HBM) on-processor; for storage including new uses for 3D Xpoint as a 3D NAND accelerator; for networking with the rise of QUIC and eXpress Data Path (XDP); and so on. Ford, et al., “TCP

Performance 52

Performance Latency Hardware Storage 52

Smashing Magazine

AUGUST 10, 2023

The other issue is that the data I’m getting back is based on lab simulations where I can add throttling, determine the device that’s used, and the network connection, among other simulated conditions. On that note, it’s worth calling out that there are multiple flavors of network throttling. Real usage data would be better, of course.

Speed 85

Speed Monitoring Testing Network 85

CSS - Tricks

APRIL 1, 2021

A 2017 study by Akamai says as much when it found that even a 100ms delay in page load can decrease conversions by 7% and lose 1% of their sales for every 100ms it takes for their site to load which, at the time of the study, was equivalent to $1.6 In DevTools, the Network inspector helps us see what the first webpage is doing too.

Cache 94

Cache Social Media Media Website 94

Alex Russell

OCTOBER 22, 2017

We constrain ourselves to a real-world baseline device + network configuration to measure progress. — Alex Russell (@slightlylate) October 4, 2017. Budgets are scaled to a benchmark network & device. For developers and decision makers with fast phones on fast networks this is a double-whammy of hidden costs.

Performance 74

Performance Network Benchmarking Mobile 74

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

KeyCDN

JANUARY 31, 2019

Today we’re excited to announce that we’ve launched yet another POP location to help further supercharge our network’s content delivery speeds. The next closest active POP location to Bucharest was Istanbul which was still almost 900km away; this distance adds up in terms of latency. million people. What’s Next?

Internet 48

Internet Internet Ecommerce Speed 48

O'Reilly Software

APRIL 4, 2018

A message-oriented implementation requires an efficient messaging backbone that facilitates the exchange of data in a reliable and secure way with the lowest latency possible. Another element they have in common is that they are both consuming and producing messages. Apache Kafka is currently the leading project in this area.

Architecture 80

Architecture Scalability Google Operating System 80

KeyCDN

OCTOBER 24, 2018

Today we’re excited to announce that we’ve launched yet another POP location to help further supercharge our network’s content delivery speeds. Although both countries are relatively close to one another, they are separated by a distance of approximately 500km, which adds up in terms of latency. What’s Next?

Internet 48

Internet Internet Speed Network 48

SQL Performance

SEPTEMBER 17, 2019

For years SSRS was bundled with the installation of SQL Server, which helped add to some of the confusion around licensing and support for the product, so beginning with SSRS 2017, the installation package for Reporting Services is a separate download. Disk latency for ReportServer and ReportServerTempDB are very important.

Tuning 67

Tuning Servers Database Best Practices 67

Alex Russell

APRIL 29, 2021

Real-time network protocols for enabling videoconferencing, desktop sharing, and game streaming applications. Modern, asynchronous network APIs that dramatically improve performance in some situations. WebGL 2 launched for other platforms on Chrome and Firefox in 2017. Delayed five years. Gamepad API. fetch() and Streams.

Media 145

Media Games Education Engineering 145

IO River

NOVEMBER 2, 2023

Delta Air Lines experienced a severe system outage in 2017, resulting in flight cancellations and delays across their network. Proactive monitoring aids in detecting performance bottlenecks, latency difficulties, and other anomalies that may influence availability.

Availability 52

Availability Social Media Traffic Games 52

IO River

NOVEMBER 2, 2023

Delta Air Lines experienced a severe system outage in 2017, resulting in flight cancellations and delays across their network. Proactive monitoring aids in detecting performance bottlenecks, latency difficulties, and other anomalies that may influence availability.

Availability 52

Availability Social Media Traffic Games 52

All Things Distributed

SEPTEMBER 29, 2016

Based in the Paris area, the region will provide even lower latency and will allow users who want to store their content in datacenters in France to easily do so. The new region in France will be ready for customers to use in 2017. Cette nouvelle région sera disponible pour les clients dès 2017.

AWS 158

AWS IoT Internet Internet 158

The Netflix TechBlog

OCTOBER 14, 2024

Using this approach, we observed latencies ranging from 1 to 10 seconds, averaging 7.4 Blame The Network The next theory was that the network between the web browser UI (on the laptop) and the JupyterLab server was slow. the JupyterLab process) rather than the network. The input to stdin is sent to the backend (i.e.,

Latency 212

Latency Virtualization Traffic Processing 212

Smashing Magazine

JANUARY 7, 2019

If you don’t have a device at hand, emulate mobile experience on desktop by testing on a throttled network (e.g. To make the performance impact more visible, you could even introduce 2G Tuesdays or set up a throttled 3G network in your office for faster testing. 150ms RTT, 1.5 Mbps down, 0.7 Mbps up) with a throttled CPU (5× slowdown).

Performance 111

Performance Cache Network Metrics 111