Adrian Cockcroft

JANUARY 29, 2023

There is no way to model how much more traffic you can send to that system before it exceeds it’s SLA. Bill Kaiser of NewRelic published this blog in 2017 which goes some way towards what I’m talking about, but since then I have figured out a new way to interpret the data. Mu is the mean of each component, the latency.

Lambda 98

Lambda Latency Cache C++ 98

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side.

Speed 103

Speed Java AWS Virtualization 103

Smashing Magazine

AUGUST 10, 2023

In contrast, tools like DebugBear and WebPageTest use more realistic throttling that accurately reflects network round trips on a higher-latency connection. The report, released in 2017, provides network data from sessions collected from real Chrome users. Real usage data would be better, of course.

Speed 85

Speed Monitoring Testing Network 85

IO River

NOVEMBER 2, 2023

Delta Air Lines experienced a severe system outage in 2017, resulting in flight cancellations and delays across their network. The stakes are even higher during high-traffic periods such as Black Friday or Cyber Monday. High availability is a business imperative in this sector.

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. The stakes are even higher during high-traffic periods such as Black Friday or Cyber Monday. High availability is a business imperative in this sector.

Availability 52

Availability Social Media Traffic Games 52

Alex Russell

OCTOBER 22, 2017

— Alex Russell (@slightlylate) October 4, 2017. Contended, over-subscribed cells can make “fast” networks brutally slow, transport variance can make TCP much less efficient , and the bursty nature of web traffic works against us. We now have everything we need to create a ballpark perf budget for a product in 2017.

Performance 74

Performance Network Benchmarking Mobile 74

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side.

Speed 40

Speed Java AWS Virtualization 40

The Symphonia

MAY 22, 2018

Gojko Adzic has done some great speaking and writing on his experience here, and I included the link to his talk from late 2017. I also rewrote the section on Startup Latency since Cold Starts are one of the big “FUD” areas of Serverless. I was glad to be able to talk about Amazon’s automated traffic shifting / canary releases.

Serverless 40

Serverless Architecture Lambda Azure 40

The Netflix TechBlog

OCTOBER 14, 2024

Using this approach, we observed latencies ranging from 1 to 10 seconds, averaging 7.4 However, when we captured packets on the ZeroMQ socket while reproducing the issue, we didn’t observe heavy traffic on this socket that could cause such blocking. Meanwhile, traffic from other ports, such as port 22 for SSH, remained unaffected.

Latency 212

Latency Virtualization Traffic Processing 212

Smashing Magazine

JANUARY 7, 2019

For Mac OS, we can use Network Link Conditioner , for Windows Windows Traffic Shaper , for Linux netem , and for FreeBSD dummynet. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. Alex Danilo has explained WebAssembly and how it works at his Google I/O 2017 talk.

Performance 111

Performance Cache Network Metrics 111