Brendan Gregg

JULY 4, 2021

## References I've reproduced the talk references below, so you can click on links: - [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] Jul 2008 - [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] 2010 - [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency? Ford, et al., “TCP

Performance 121

Performance Latency Hardware Storage 121

Dynatrace

DECEMBER 22, 2019

The example below visualizes average latency by API name and stage for a specific AWS API Gateway. Stay tuned for updates in Q1 2020. You can observe the metrics across service instances split by region (in this example, API Gateways in us-east-1 and us-east-2 ). You can also create custom charts. Requirements. AWS supporting services.

AWS 200

AWS Metrics IoT Storage 200

All Things Distributed

OCTOBER 31, 2019

The new AWS Europe (Spain)Region will consist of three Availability Zones (AZs) at launch, and will be AWS's seventh region in Europe, joining existing regions in Dublin, Frankfurt, London, Paris, Stockholm, and the upcoming Milan region launching in early 2020.

AWS 27

AWS Education Government Latency 27

Dynatrace

DECEMBER 22, 2019

The example below visualizes average latency by API name and stage for a specific AWS API Gateway. Stay tuned for updates in Q1 2020. You can observe the metrics across service instances split by region (in this example, API Gateways in us-east-1 and us-east-2 ). You can also create custom charts. Requirements. AWS supporting services.

AWS 182

AWS Metrics IoT Storage 182

The Netflix TechBlog

MAY 14, 2021

We are expected to process 1,000 watermarks for a single distribution in a minute, with non-linear latency growth as the number of watermarks increases. The goal is to process these documents as fast as possible and reliably deliver them to recipients while offering strong observability to both our users and internal teams.

Traffic 166

Traffic Java Latency Google 166

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. Clone Disk],” - [link] 2020 - [Moore 20] Samuel K. Ford, et al., “TCP

Performance 103

Performance Latency Cache Google 103

The Netflix TechBlog

NOVEMBER 2, 2020

Those two metrics are approximate indicators of failures and latency. In 2020, days after the implementation was deployed, the team started seeing the benefit of the solution. Service throttling Zuul can sense when a back-end service is in trouble by monitoring the error rates and concurrent requests to that service.

Traffic 261

Traffic Metrics Infrastructure Architecture 261

KeyCDN

NOVEMBER 4, 2021

The POP is strategially located within the country and lowers latency overall. KeyCDN is always on the lookout for ways to minimize latency and accelerate asset delivery worldwide. Hola Mexico! We've launched our new point of presence (POP) in Mexico City.

Latency 111

Latency Cache Tuning Traffic 111

All Things Distributed

NOVEMBER 12, 2018

With this launch, AWS now provides 57 Availability Zones, with another 12 zones and four Regions in Bahrain, Cape Town, Hong Kong SAR, and Stockholm expected to come online by 2020.

AWS 115

AWS Healthcare Cloud Government 115

Brendan Gregg

MAY 8, 2021

From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. Note the sdb latencies range from 32 ms to over 2 seconds! Linux 4.15.0-66-generic

Performance 133

Performance Latency Speed Systems 133

CSS - Tricks

MARCH 16, 2020

To stop reports from different websites getting mixed up, we’ll organize them like so: lukeharrison.dev 2020-01-31T18:18:12.648Z.json 2020-01-31T19:10:24.110Z.json cnn.com 2020-01-14T22:15:10.396Z.json lh.js. If your latency is higher than 50ms, users may perceive your app as laggy. Creating the directory. native module.

Google 86

Google Latency Website Metrics 86

All Things Distributed

NOVEMBER 13, 2018

The AWS Europe (Milan) Region will have three Availability Zones and be ready for customers in early 2020. It's the sixth AWS Region in Europe, joining existing regions in France, Germany, Ireland, the UK, and the new Region that we recently announced in Sweden.

AWS 164

AWS Energy Automotive Traffic 164

CSS - Tricks

DECEMBER 14, 2020

And there’s an enormous wealth of information about how the web changed in 2020. While this is suboptimal on desktop, it really kills performance on mobile, where round-trip latency is more important than raw download speed. In fact, this report is more like an enormous book and it’s entirely fabulous.

Latency 98

Latency Mobile Website Speed 98

All Things Distributed

OCTOBER 25, 2018

It is our first Region in Africa, and we're shooting to have it ready in the first half of 2020. The new AWS Africa (Cape Town) Region will have three Availability Zones and provide lower latency to end users across Sub-Saharan Africa.

AWS 167

AWS Cloud Education Programming 167

The Morning Paper

NOVEMBER 8, 2020

Facebook, Inc. ), OSDI’2020. The initial version of Delos went into production after eight months using a ZooKeeper-backed Loglet implementation, and then four months later it was swapped out for a new custom-built NativeLoglet that gave a 10x improvement in end-to-end latency. Virtual consensus in Delos , Balakrishnan et al.

Virtualization 126

Virtualization Latency Storage Systems 126

The Morning Paper

FEBRUARY 6, 2020

arXiv 2020. On the Cloudburst design teams’ wish list: A running function’s ‘hot’ data should be kept physically nearby for low-latency access. A low-latency autoscaling KVS can serve as both global storage and a DHT-like overlay network. Cloudburst: stateful functions-as-a-service , Sreekanti et al.,

Serverless 98

Serverless Lambda Cache Latency 98

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map. runqlat CPU scheduler latency heat map. Here are the top ten tools you can run and present as a generic BPF observability dashboard, along with suggested visualizations: Tool Shows Visualization. execsnoop New processes (via exec(2)) table. opensnoop Files opened table.

Latency 144

Latency Cache Energy Systems 144

Sutter's Mill

SEPTEMBER 11, 2020

It’s hard to believe CppCon 2020 is nearly here… in fact, pre-conference tutorials are already in progress. I’ll be at the conference throughout the week in the hallways and session rooms. Here are some of the times I’ll be participating on the actual program: Sunday 1300 MDT: Organizer’s Panel.

C++ 91

C++ Games Programming Latency 91

Alex Russell

MARCH 6, 2021

twitter.com/slightlylate/status/1139684093602349056 455 06:18 AM · Feb 28, 2020. A silver lining on this dark cloud is that mobile JavaScript payload growth paused in 2020. Sadly, data on latency is harder to get, even from Google's perch, so progress there is somewhat more difficult to judge. How bad is it?

Performance 127

Performance Network Mobile Metrics 127

Brendan Gregg

JULY 4, 2021

## References I've reproduced the talk references below, so you can click on links: - [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] Jul 2008 - [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] 2010 - [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency? Ford, et al., “TCP

Performance 52

Performance Latency Hardware Storage 52

All Things Distributed

DECEMBER 12, 2018

With this launch, AWS now provides 60 Availability Zones, with another 12 zones and four Regions expected to come online by 2020 in Bahrain, Cape Town, Hong Kong, and Milan. Starting today, developers, startups, and enterprises—as well as government, education, and non-profit organizations—can use the new AWS Europe (Stockholm) Region.

AWS 119

AWS Cloud Games Serverless 119

The Netflix TechBlog

DECEMBER 17, 2019

Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low. We are planning to open source DBLog in 2020 and include additional documentation.

Database 221

Database Traffic Transportation Open Source 221

The Netflix TechBlog

DECEMBER 17, 2019

Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low. We are planning to open source DBLog in 2020 and include additional documentation.

Database 206

Database Traffic Transportation Open Source 206

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. Clone Disk],” [link] , 2020 [Moore 20] Samuel K. Ford, et al., “TCP

Performance 52

Performance Latency Cache Google 52

KeyCDN

NOVEMBER 29, 2022

KeyCDN is always looking for ways to minimize latency and accelerate the delivery of assets worldwide. So far, we could cover Latin America through Mexico City, Santiago, and São Paulo. Now Buenos Aires and Bogotá have been added.

Latency 60

Latency Cache Tuning Traffic 60

Speed Curve

MARCH 11, 2024

Way back in 2020, Cliff Crocker took a closer look at First Input Delay and found that FID did not meaningfully correlate with actual user behaviour. One of the biggest culprits: latency, which is typically worse on mobile. Here at SpeedCurve, we definitely get excited about emerging metrics. Does INP correlate to user behaviour?

Mobile 88

Mobile Google Metrics Monitoring 88

O'Reilly

DECEMBER 2, 2019

For applications like communication between AVs, latency–how long it takes to get a response–is more likely to be a bigger limitation than raw bandwidth, and is subject to limits imposed by physics. There are impressive estimates for latency for 5G, but reality has a tendency to be harsh on such predictions.

Wireless 56

Wireless Serverless IoT Network 56

Percona

MAY 2, 2023

This blog was originally published in September 2020 and was updated in May 2023. test.collG 1533/195563 (0.8%) Aug 19 08:48:09 ip-172-30-2-122 pbm-agent[24331]: 2020/08/19 08:48:09 [####################.] test.collF 116432/134747 (86.4%) Aug 19 10:01:09 ip-172-30-2-122 pbm-agent[24331]: 2020/08/19 10:01:09 [#######################.]

Best Practices 52

Best Practices Database Storage Servers 52

O'Reilly

JULY 20, 2021

In 2020, Wink suddenly applied a monthly service charge; if you didn’t pay, the device would stop working. Also in 2020, Sonos caused a stir by saying they were going to “recycle” (disable) old devices. They eventually changed their policy.

Google 134

Google Games Technology Technology 134

Smashing Magazine

AUGUST 3, 2023

It was only in 2020, though, that Google shared its concept of Core Web Vitals and how it impacts SEO efforts. This proximity significantly reduces the time it takes for the data to travel from the server to the user, thus reducing latency and improving load times. Bookaway site search. Time to First Byte over time. LCP in seconds.

Performance 78

Performance Cache Traffic Metrics 78

Alex Russell

JANUARY 30, 2024

Test Device Recommendations # Re-using last year's P75 device calculus , our estimate is based on a device sold new, unlocked for the mid-2020 to mid-2021 global ASP of ~$350-375. If you or your company are able to generate a credible worldwide latency estimate in the higher percentiles for next year's update, please get in touch.

Performance 98

Performance Network Mobile Speed 98

Alex Russell

JUNE 20, 2020

Alex Russell @slightlylate Software moves to the web (when not prevented by poor browsers and/or unconscionable policy) because it's a better version of computing: kwokchain.com/2020/06/19/why-figma-wins/ It has been really surprising to me how few frontend folks are investing deeply in sync & collaboration tech.

Games 64

Games Hardware Java Mobile 64

Brendan Gregg

MAY 8, 2021

From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. The latencies here look like they are a mix of normal speed (~1.9 Hit Ctrl-C to end.

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. Note the sdb latencies range from 32 ms to over 2 seconds! Linux 4.15.0-66-generic

Performance 40

Performance Latency Speed Systems 40

Alex Russell

JULY 14, 2021

iOS gained browser support in late 2020 (a dozen years late) via an Entitlement. [4] in late 2020 , bringing iOS into line with every other significant OS in supporting alternative browsers. [10]. iOS's security track record, patch velocity, and update latency for its required-use engine is not best-in-class.

Google 134

Google Mobile Engineering Internet 134

Testsigma

JANUARY 30, 2021

The graph below shows the result of a survey performed by Statistica in 2020 on the increase of usage of mobile data across years. Testing helps in finding latency time of an application: Users prefer to use mobile phones over desktop when they are looking for any query, booking flight/movie ticket.

Mobile 52

Mobile Testing Website Internet 52

Adrian Cockcroft

MARCH 17, 2020

Picture taken by Adrian March 17, 2020 A resilient system continues to operate successfully in the presence of failures. The essential component of a control system is a low latency and dependable way to measure the thing we are trying to control. Memorial at Hawaiian native burial ground, Kapalua, Maui. What Happens Next?

Healthcare 52

Healthcare Government Airlines Systems 52