DZone

AUGUST 29, 2021

In this blog post, we’ll examine one such case where we use the Sentry JavaScript SDK to instrument Jest (which runs our frontend test suite) and how we addressed the issues that we found. We have high-level metrics for how well (or not) our CI is performing.

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Testing Performance Testing Metrics Systems 335

Dynatrace

FEBRUARY 27, 2025

Semconv for HTTP Spans quite possibly the most important signal have been declared stable, and HTTP Metrics will hopefully soon follow. In 2025, we expect to see the first releases, so youll be able to test out this innovative technology. Semantic Conventions, or semconv, are the standard that makes it all possible.

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Tuning Open Source Innovation Monitoring 310

The Netflix TechBlog

SEPTEMBER 22, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the second post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. An A/B test is a simple controlled experiment. Some metrics will be specific to the given hypothesis.

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Testing Entertainment Metrics Social Media 246

Dynatrace

DECEMBER 15, 2020

OpenTelemetry metrics are useful for augmenting the fully automatic observability that can be achieved with Dynatrace OneAgent. OpenTelemetry metrics add domain specific data such as business KPIs and license relevant consumption details. It has undergone security analysis and testing in accordance with AWS requirements.

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AWS Metrics Analytics Government 255

Dynatrace

MARCH 5, 2025

The Carbon Impact app directly supports our customers sustainability efforts through granular real-time emissions reporting and analytics, translating host utilization metrics into their CO2 equivalent (CO2e). We implemented a wasted energy metric in the app to enhance practitioner actionability.

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Energy Analytics Traffic Cloud 223

Dynatrace

AUGUST 2, 2021

Metrics matter. But without complex analytics to make sense of them in context, metrics are often too raw to be useful on their own. To achieve relevant insights, raw metrics typically need to be processed through filtering, aggregation, or arithmetic operations. Examples of metric calculations. Dynatrace news.

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Metrics Analytics Google Code 246

Dynatrace

JANUARY 5, 2022

Credits on content go to him and the work he has been doing around performance & resiliency testing automation. Our Application Performance Management (APM) and load test team at T-Systems MMS helps our customers reduce the risk of failed releases. Automation : Single load test executions can be repeated and tracked.

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Testing Open Source Metrics Infrastructure 246

The Netflix TechBlog

JUNE 14, 2023

The three strategies we will discuss today are AB Testing , Replay Testing, and Sticky Canaries. To launch Phase 1 safely, we used AB Testing. To launch Phase 2 safely, we used Replay Testing and Sticky Canaries. We knew we could test the same query with the same inputs and consistently expect the same results.

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Traffic Latency Metrics Cache 357

Dynatrace

OCTOBER 16, 2023

Synthetic testing simulates real-user behaviors within an application or service to pinpoint potential problems. Here’s a look at why this testing matters, how it works, and what companies need to get the most from this approach. What is synthetic testing? RUM, meanwhile, requires actual users.

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Testing Best Practices Testing Tools Monitoring 246

DZone

AUGUST 21, 2021

The responsibility of developers keeps growing, and as mobile apps get more complex, new tools for mobile performance monitoring and testing are being born. Speed, UX, availability, and frequency of updates are increasingly important with mobile apps. But this process usually takes a couple of weeks.

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Dynatrace

JUNE 3, 2022

So, whenever your end users’ digital experience is bogged down by a problem, whether it’s the result of a synthetic test (browser and synthetic), mobile app monitoring, or web monitoring, your teams need to see the most pertinent information about the impact and the root cause at a glance.

Metrics 246

Metrics Mobile IoT Monitoring 246

Dynatrace

APRIL 30, 2021

As organizations develop more applications and microservices, they are discovering they also need to run more performance tests in the same amount of time or less to meet service-level objectives (SLOs) that fulfill service-level agreements (SLAs). How can organizations address this process bottleneck and run more tests in less time?

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DZone

MAY 15, 2020

Now that you’ve deployed your code, it’s time to monitor it, collect data, and analyze your metrics. You’ve just released your new app into the wild, live in production. Your job is done, right? Without application performance monitoring in place, you can’t accurately determine how well things are going. Are people using your app?

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Metrics Performance Development Monitoring 246

Dynatrace

OCTOBER 10, 2024

While histograms look much like time-series bar charts, they’re different in that each bar represents a count (often termed frequency) of metric values. It is worth taking some time to test out different bin sizes to see how the distribution looks in each one, then choose the best plot that represents the data.

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Latency Infrastructure Monitoring Metrics 246

Dynatrace

MARCH 13, 2025

You can also use it to test different OpenTelemetry features and evaluate how they appear on backends. The configuration also includes an optional span metrics connector, which generates Request, Error, and Duration (R.E.D.) metrics from span data. metrics from span data. Select + then select Metrics from the drop-down.

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DZone

JULY 21, 2022

Development of any software is a tedious and long process, and it undergoes a series of quality and performance tests before its release and use. As the technological world evolves, so do user expectations for handling applications; it is essential to test the performance of the applications before deploying them on a large scale.

Software 246

Software Software Development Metrics 246

DZone

MAY 31, 2022

A website needs to be constantly tested and optimized to be in line with Google's web and SEO guidelines. Core Web Vitals is a key performance metric that analyzes the website's performance by investigating the data and provides a strategic platform to scale up the website's user experience. What Is Web Performance Testing?

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Performance Testing Testing Website Performance Performance 244

The Netflix TechBlog

OCTOBER 26, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the fourth post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. Have a look at Part 1 (Decision Making at Netflix), Part 2 (What is an A/B Test?), Need to catch up?

Testing 211

Testing Metrics Latency Design 211

The Netflix TechBlog

DECEMBER 19, 2024

Frequently, practitioners want to experiment with variants of these flows, testing new data, new parameterizations, or new algorithms, while keeping the overall structure of the flow or flowsintact. A natural solution is to make flows configurable using configuration files, so variants can be defined without changing the code.

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Best Practices Cache Metrics Code 204

The Netflix TechBlog

OCTOBER 7, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the third post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. Have a look at Part 1 (Decision Making at Netflix) and Part 2 (What is an A/B Test?). Need to catch up?

Testing 235

Testing Games Metrics Innovation 235

The Netflix TechBlog

MAY 4, 2023

The second phase involves migrating the traffic over to the new systems in a manner that mitigates the risk of incidents while continually monitoring and confirming that we are meeting crucial metrics tracked at multiple levels. Replay Solution The replay traffic testing solution comprises two essential components.

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Traffic Latency Tuning Systems 347

DZone

JUNE 28, 2021

For gaining maximum benefits out of automation testing , testers require hands-on experience in a minimum of one automation programming language. Which Automation Programming Language Is the Best for Testing? There are numerous programming languages available today, with new ones continuously emerging.

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Programming Artificial Intelligence Blockchain Java 363

DZone

APRIL 16, 2021

Introduction. Today, the demand for software is higher than ever. Lines of code govern almost everything we do in our day-to-day activities. The way we buy, the way we sell, even the way we communicate. In 2019, according to Evans Data Corporation, there were 23.9 million developers worldwide.

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Speed Software Software Metrics 290

Dynatrace

SEPTEMBER 4, 2020

While an SLI is just a metric, an SLO just a threshold you expect your SLI to be in and SLA is just the business contract on top of an SLO. Thanks to its event-driven architecture, Keptn can pull SLIs (=metrics) from different data sources and validate them against the SLOs. class SRE implements DevOps) !

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DevOps Metrics Innovation Azure 326

Dynatrace

MAY 28, 2020

After a new build gets deployed and automated tests executed, SLIs are evaluated against their SLOs and, depending on that result, a build is considered good (promoted) or bad (rolled back). “ The app description and supporting files such as load testing scripts are on the Keptn Example GitHub. This is what this blog is all about.

Engineering 270

Engineering Performance Metrics Best Practices 270

DZone

JANUARY 18, 2023

Code coverage is a software quality metric commonly used during the development process that let’s you determine the degree of code that has been tested (or executed). To achieve optimal code coverage, it is essential that the test implementation (or test suites) tests a majority percent of the implemented code.

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Code Java C++ Metrics 319

The Netflix TechBlog

JUNE 13, 2023

Our previous blog post presented replay traffic testing — a crucial instrument in our toolkit that allows us to implement these transformations with precision and reliability. By tracking metrics only at the level of service being updated, we might miss capturing deviations in broader end-to-end system functionality.

Traffic 285

Traffic Metrics Systems Strategy 285

Dynatrace

AUGUST 12, 2024

The addition of more and more metrics over time has only made this increasingly complex. Performance metrics to improve can be Visually Complete, Speed Index, or other timing metrics associated with the page load cycle. It predicts user behavior based on performance/error experience.

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Airlines Metrics Speed Internet 290

Dynatrace

AUGUST 21, 2024

This approach enhances key DORA metrics and enables early detection of failures in the release process, allowing SREs more time for innovation. This blog post explores the Reliability metric , which measures modern operational practices. Why reliability? While it is powerful, it presents several challenges that affect its adoption.

Engineering 262

Engineering Systems Latency Metrics 262

Dynatrace

MARCH 5, 2021

For example, you might be using: any of the 60+ StatsD compliant client libraries to send metrics from various programming languages directly to Dynatrace; any of the 200+ Telegraf plugins to gather metrics from different areas of your environment; Prometheus, as the dominant metric provider and sink in your Kubernetes space.

Metrics 286

Metrics Network Monitoring Infrastructure 286

Dynatrace

JULY 15, 2024

As HTTP and browser monitors cover the application level of the ISO /OSI model , successful executions of synthetic tests indicate that availability and performance meet the expected thresholds of your entire technological stack. into NAM test definitions. Our script, available on GitHub , provides details.

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Availability Network Monitoring Infrastructure 246

Dynatrace

FEBRUARY 21, 2024

Automating quality gates is ideal, as it minimizes manually checking and validating key metrics throughout the SDLC. By actively monitoring metrics such as error rate, success rate, and CPU load, quality gates instill confidence in teams during software releases. Several tools can be used to collect metrics in load/performance testing.

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Speed Software Software Latency 264

Dynatrace

MAY 7, 2024

Fluent Bit is a telemetry agent designed to receive data (logs, traces, and metrics), process or modify it, and export it to a destination. Fluent Bit and Fluentd were created for the same purpose: collecting and processing logs, traces, and metrics. Observability: Elevating Logs, Metrics, and Traces! What is Fluent Bit?

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Best Practices IoT Metrics Storage 279

Alex Podelko

SEPTEMBER 8, 2020

Some time ago Federico Toledo published Performance Testing with Open Source Tools- Busting The Myths. I remember really liking the technical side of these tests. But I must confess I was not too fond of having to report the results to stakeholders or deal with political/personal issues related to (poor) test results.

Open Source 223

Open Source Performance Testing Testing Performance 223

Dynatrace

MARCH 17, 2025

The OpenTelemetry community created its demo application, Astronomy Shop, to help developers test the value of OpenTelemetry and the backends they send their data to. But as most developers know, its the observability backend that reveals the value of your data and instrumentation strategy.

Monitoring 147

Monitoring Analytics Metrics Strategy 147

Dynatrace

MARCH 17, 2025

Collect metrics on energy consumption or derive them from existing signals. While building production systems that can scale to zero and reliably restart can be challenging, it’s often simpler in test stages and build pipelines, making this a great place to start.

Software Engineering 147

Software Engineering Engineering Software Software 147

CSS Wizardry

NOVEMBER 3, 2020

Any time you run a test with WebPageTest, you’ll get this table of different milestones and metrics. Note the bottom row shows me the Standard Deviation of the tests’ results. Higher variance means a less stable metric across pages. With my pen and paper, I’ll make a note of investigating these specifically in my testing.

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Speed Ecommerce Metrics Analytics 337