Brendan Gregg

MARCH 16, 2024

But there are 15% of samples on the left, above "[unknown]", that are in the wrong place and missing frames. To explain this example in more detail: The profiler periodically interrupts software execution, and for those disconnected stacks it happens to be the execution of the kernel software ("vfs*", "ext*", etc.).

Java 145

Java Cache Google Hardware 145

The Netflix TechBlog

SEPTEMBER 2, 2020

Example call graph in Edgar In some cases, the question we’re answering is, “What’s happening right now??” For teams building observability tools, the question is: how do we make understanding a system’s behavior fast and digestible? by Elizabeth Carretto Everyone loves Unsolved Mysteries. What is Edgar?

Latency 296

Latency Transportation Engineering Traffic 296

Randon ASCII

FEBRUARY 16, 2021

I don’t generally do random analysis of strangers’ performance problems but the case sounded interesting so I thought I’d take a look. The CPU Usage (Sampled) data (derived from a 1 kHz sampling profiler) told me that thread 9,228 was spending roughly 99.7% Lots of unscientific theories were being proposed. It was hung.

Monitoring 141

Monitoring Testing Code Servers 141

Dynatrace

JULY 23, 2019

In this blog post, I’ll cover how to implement distributed tracing in Flask applications with the OneAgent SDK. Whenever OneAgent can’t instrument your application automatically, as is currently the case with Python, you can use the OneAgent SDK to manually instrument your code. Let’s walk through how.

Monitoring 136

Monitoring Software Software Database 136

The Netflix TechBlog

APRIL 29, 2019

By Pythonistas at Netflix, coordinated by Amjith Ramanujam and edited by Ellen Livengood As many of us prepare to go to PyCon, we wanted to share a sampling of how Python is used at Netflix. Various software systems are needed to design, build, and operate this CDN infrastructure, and a significant number of them are written in Python.

Open Source 279

Open Source Network Infrastructure Big Data 279

Percona

DECEMBER 12, 2022

Our Release Roundups showcase the latest Percona software updates, tools, and features to help you manage and deploy our software. Our Release Roundups showcase the latest Percona software updates, tools, and features to help you manage and deploy our software. It’s time for the release roundup! Take a look!

Open Source 63

Open Source Azure Database Servers 63

Smashing Magazine

OCTOBER 27, 2021

The eye-tracking methodology can be extremely valuable for usability tests since it records the journey without interfering with the users’ natural behavior. Imagine, for example, that you test a prototype but discover that users are not interacting with the interface how they are supposed to.

Mobile 111

Mobile Website Hardware Social Media 111

Testsigma

MARCH 14, 2020

Adding new functionalities into an existing application or making new code changes due to bug fixes can possibly result in new issues in a software application. Regression testing is a test approach which helps testers make sure there are no new bugs due to code changes or because a new functionality was added to an existing one.

Testing 52

Testing Code Best Practices C++ 52

Testsigma

MAY 5, 2020

Regression Testing is put in place just to avoid such situations. Regression testing can be defined as testing done to verify if the code changes in a software/app have any kind of impact on the existing functionality of the product. Check out a detailed guide on regression testing. That’s an issue.

Testing 55

Testing Testing Tools Software Software 55

Testsigma

MAY 22, 2020

Bug reporting is an important and major aspect of software testing. All the prerequisites for the execution of steps and any test data details should be added in the bug. Avoid writing lengthy descriptions of the problem. If a bug is not documented, the developer fails to understand the bug or worse, reject it.

Mobile 67

Mobile Testing Best Practices Development 67

Testsigma

JUNE 5, 2021

These are showcased to prove a single point — how important a mobile phone is! Mobiles have become a priority and subsequently, the testing of websites that are rendered on it. Mobiles have become a priority and subsequently, the testing of websites that are rendered on it. In a world with a 7.5 billion population, 4.3

Mobile 52

Mobile Testing Website Testing Tools 52

Testsigma

JANUARY 18, 2021

Does this mean that enough effort was not spent in the automation testing process? The possibility is that the web developer and test automation engineer did not do thorough cross browser testing! However, choosing a scalable, secure, and reliable cross browser testing infrastructure should not be overlooked in the process.

Testing 55

Testing Operating System Website Internet 55

Testsigma

JUNE 19, 2020

As Agile methodology was introduced, the need for fast and continuous delivery of software applications increased. Fulfilling this need, automation testing within organizations increased. Various free open source and paid automation testing tools were introduced. Testsigma is cloud-based test automation tool.

Testing Tools 60

Testing Tools Testing Open Source Java 60

Smashing Magazine

JUNE 2, 2021

Improving The Performance Of An Online Store (Case Study). Improving The Performance Of An Online Store (Case Study). The project consisted of upgrading the shop software to our own open-source system and redoing the shop’s front end from scratch. Jennifer Brehm. 2021-06-02T10:30:00+00:00. 2021-06-02T13:32:39+00:00.

Performance 115

Performance Cache Website Mobile 115

Percona

MAY 2, 2023

In this blog, we will be discussing different MongoDB database backup strategies and their use cases, along with pros and cons and a few other useful tips. We will be discussing these two backup options, how to proceed with them, and which one suits better depending on requirements and environment setup.

Best Practices 52

Best Practices Database Storage Servers 52

The Morning Paper

JUNE 18, 2019

Let’s start out by getting some terms straight: SLIs, SLOs, SLAs, and how they fit together. When SLOs are tied to SLAs, they tend to end up defining the worst case behaviour that a customer can possibly tolerate (because anything beyond that triggers the penalty clause). What are we talking about.

Metrics 79

Metrics Cloud Google Network 79

Particular Software

NOVEMBER 2, 2020

NServiceBus provides the infrastructure code not provided by Lambda so that you can write business code and execute it in the Lambda environment. The NServiceBus.AwsLambda.Sqs preview package makes it easier than ever to host NServiceBus endpoints in Amazon Web Services (AWS). You only pay for the compute time you consume.

Lambda 52

Lambda AWS Serverless Programming 52

Rigor

FEBRUARY 19, 2020

One of the key benefits of synthetic monitoring is that you can define the specific actions of a test, allowing you to walk through key flows of your application like a checkout flow or a sign-up flow, to verify its functionality and performance. Do you need to manually write code or steps? Measure and Compare Performance Experiments.

Monitoring 59

Monitoring Benchmarking Mobile Traffic 59

O'Reilly Software

MARCH 7, 2018

Software today is not typically a single program—something that is executed by an operator or user, producing a result to that person—but rather a service : something that runs for the benefit of its consumers, a provider of value. Build a more scalable, composable, and functional architecture for interconnecting systems and applications.

Transportation 72

Transportation Java Programming Architecture 72

Smashing Magazine

JANUARY 11, 2021

How do we actually know where we stand in terms of performance, and what exactly our performance bottlenecks are? And, most importantly, where do we even start improving performance and how do we establish a performance culture long-term? LogRocket tracks key metrics, incl. Get a free trial of LogRocket today. Quick Wins.

Performance 145

Performance Cache Media Metrics 145

Adrian Cockcroft

NOVEMBER 11, 2019

Infrequent failures exercise poorly tested capabilities that tend to amplify problems in unexpected ways rather than mitigate them, so it’s important to carefully exercise the system to ensure that design controls are well tested and operating correctly. This discussion focuses on hardware, software and operational failure modes.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

Infrequent failures exercise poorly tested capabilities that tend to amplify problems in unexpected ways rather than mitigate them, so it’s important to carefully exercise the system to ensure that design controls are well tested and operating correctly. This discussion focuses on hardware, software and operational failure modes.

Latency 53

Latency Engineering Systems Hardware 53

Smashing Magazine

JANUARY 6, 2020

How do we actually know where we stand in terms of performance, and what our performance bottlenecks exactly are? And, most importantly, where do we even start improving performance and how do we establish a performance culture long-term? Testing And Monitoring. Web performance is a tricky beast, isn’t it? Quick Wins.

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 7, 2019

How do we actually know where we stand in terms of performance, and what our performance bottlenecks exactly are? And, most importantly, where do we even start improving performance and how do we establish a performance culture long-term? Testing And Monitoring. Web performance is a tricky beast, isn’t it? Quick Wins.

Performance 103

Performance Cache Metrics Network 103

Dynatrace

SEPTEMBER 26, 2019

Over the last few years we’ve talked a lot about how at Dynatrace we have changed our development processes in order to deploy new feature releases with every sprint, as well as providing a fast-lane to production that allows us to deploy important updates to our customers within an hour. I have a new idea. 1 Let’s track it with JIRA.

Education 36

Education Programming Processing DevOps 36

Particular Software

AUGUST 8, 2017

Each database engine supported by SQL Persistence is fully documented and backed by a suite of acceptance tests that is run for every engine type on each release. While we've been working hard on supporting.NET Core lately, you may have noticed that we also released a brand new (and dare we say better?) All it uses is a DbConnection.

DevOps 40

DevOps Database Education Engineering 40

Smashing Magazine

SEPTEMBER 27, 2021

Let’s Dive Into Cypress For End-to-End Testing. Let’s Dive Into Cypress For End-to-End Testing. Software development without automated testing is hard to imagine today. A good variety of different test procedures will ensure a high level of quality. As a foundation for testing, we can use a number of unit tests.

Testing 135

Testing Website Code Efficiency 135

SQL Server According to Bob

JANUARY 11, 2020

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. This will help you increase system performance and avoid I/O environment errors.

Servers 40

Servers Cache Media Hardware 40

SQL Server According to Bob

JANUARY 11, 2020

Copyright The information ​​ that is contained ​​ in this document represents the current view of Microsoft Corporation on the issues discussed as of the date of publication. This White Paper is for informational purposes only. Complying with all applicable copyright laws is the responsibility of the user.

Servers 40

Servers Cache Database Media 40

SQL Server According to Bob

DECEMBER 31, 2018

I was doing backups and clean-ups and ran across a couple of sample projects for XEvent and event_sequence processing I thought others might find helpful. How It Works: XEvent Output and Visualization SQL Server Management Studio Provides–“XE Profiler” Use the SSMS XEvent Profiler. The XEProfiler Sample. TSQL Sample Session.

Efficiency 40

Efficiency Code Servers Cache 40

Smashing Magazine

AUGUST 24, 2021

How To Automate Documentation Workflow For Developers. How To Automate Documentation Workflow For Developers. Many teams struggle with writing documentation. Many teams struggle with writing documentation. Writing good documentation is important for the developer and customer experiences. Portia Burton.

Development 119

Development Benchmarking Code Engineering 119

Smashing Magazine

JULY 16, 2021

In this case, an increased developer experience actually helps the user and “baking accessibility into components” ( as Hidde de Vries puts it) creates a win-win scenario for everyone. Marcus Herrmann. 2021-07-16T13:00:00+00:00. 2021-07-16T17:35:03+00:00. I think not. Insight 1: JavaScript Framework Features For Accessibility Are Underused.

Strategy 140

Strategy Virtualization Government Education 140

Smashing Magazine

OCTOBER 19, 2021

He’s the author of the book, Operations Anti-Patterns, DevOps Solutions for Manning Publishing, which shows how to implement DevOps techniques in the kind of imperfect environments most developers work in. How are you? Jeff Smith: I’m smashing, Drew, how you doing? Smashing Podcast Episode 42 With Jeff Smith: What Is DevOps?

DevOps 83

DevOps Metrics Systems Design 83

Smashing Magazine

DECEMBER 17, 2021

To follow the steps in this tutorial, you should have the following: a Stripe account (you can create one for free and use the test mode to avoid incurring any charges while following the steps in this article); a basic understanding of JavaScript and React; an Auth0 account (you can sign up for a free one). Nwani Victory. Introduction.

Azure 95

Azure Serverless Code Testing 95

Smashing Magazine

SEPTEMBER 29, 2021

The efficiency of a codec can be mainly measured by how much compression it can achieve. While encoding may be one-time in the case of static images, the browser still has to decode images before rendering them. Key user-centric metrics often depend on the size, number, layout, and loading priority of images on the page. Compression.

Open Source 144

Open Source Speed Website Google 144