Dynatrace

JANUARY 31, 2024

Bringing together metrics, logs, traces, problem analytics, and root-cause information in dashboards and notebooks, Dynatrace offers an end-to-end unified operational view of cloud applications. For model explainability, they can implement custom regression tests, providing indicators of model reputation and behavior over time.

Cache 213

Cache Azure Infrastructure Monitoring 213

Dynatrace

MAY 17, 2023

Validation tasks are then extended left to cover performance testing and release validation in a pre-production environment. Resilient applications with chaos testing in pre-production Another Dynatrace team uses a guardian as a safeguard during chaos testing. The queries are depicted below (sensitive data has been removed).

DevOps 195

DevOps Traffic Latency Best Practices 195

Dynatrace

SEPTEMBER 13, 2023

The Site Reliability Guardian helps automate release validation based on SLOs and important signals that define the expected behavior of your applications in terms of availability, performance errors, throughput, latency, etc. If so, test against the response time objective under the same Site Reliability Guardian.

AWS 257

AWS Efficiency Azure Cloud 257

The Netflix TechBlog

SEPTEMBER 8, 2020

To prepare ourselves for a big change in the tech stack of our endpoint, we decided to track metrics around the time taken to respond to queries. After some consultation with our backend teams, we determined the most effective way to group these metrics were by UI screen. For the migration, testing was a first-class citizen.

Latency 233

Latency Cache Java Traffic 233

DZone

FEBRUARY 26, 2021

To ensure that users get high-performing software that works seamlessly under all load conditions, performance testing is necessary. This test helps to measure the speed, scalability, reliability, and stability of software under varying loads, thus it ensures stable performance. Today, let's learn more about this testing type in depth.

Performance Testing 122

Performance Testing Testing Performance Latency 122

Dynatrace

NOVEMBER 6, 2023

When an incident occurs, developers need to know what data to look at, where the incident occurred, and other relevant metrics. In this example, Grabner saw that the adservice workload was running on EKS and could see the relevant metrics, logs, services, events, error logs, and more. I call this pre-crime alerting,” said Grabner. “I

Development 271

Development DevOps Programming Cloud 271

The Netflix TechBlog

AUGUST 30, 2021

By Benson Ma , Alok Ahuja Introduction At Netflix, hundreds of different device types, from streaming sticks to smart TVs, are tested every day through automation to ensure that new software releases continue to deliver the quality of the Netflix experience that our customers enjoy. In this blog post, we will focus on the latter feature set.

Latency 213

Latency Traffic Transportation Hardware 213

CSS Wizardry

OCTOBER 27, 2018

A lot of companies—even if they are aware that performance is key to their business—are often unsure of how, when, or where performance testing sits within their development lifecycle. Each kind of testing is listed chronologically—that is, you should do them in order—but all complement each other, and will ultimately feed into one another.

Performance Testing 172

Performance Testing Testing Performance Strategy 172

Dynatrace

APRIL 8, 2024

In summary, the Dynatrace platform enables banks to do the following: Capture any data type: logs, metrics, traces, topology, behavior, code, metadata, network, security, web, and real-user monitoring data, and business events. Automate stress-testing and regulatory reporting requirements. Break down data silos.

Analytics 210

Analytics Infrastructure Efficiency Technology 210

CSS Wizardry

MAY 19, 2020

I ran the same suite of tests against the harry.is For each test, I captured the following metrics: First Paint (FP): To what extent is the critical path affected? The Google Fonts file is the only render-blocking external resource either of the two tests has, and we can see they both have the exact same first paint.

Google 364

Google Media Latency Metrics 364

Dynatrace

APRIL 26, 2022

Fast, consistent application delivery creates a positive user experience that can ultimately drive customer loyalty and improve business metrics like conversion rate and user retention. It is proactive monitoring that simulates traffic with established test variables, including location, browser, network, and device type.

Monitoring 213

Monitoring Social Media IoT Metrics 213

Dynatrace

MAY 5, 2021

Keptn closes the loop of planning, testing, deployment, and analysis in Agile-like environments with the help of quality gates defined by service- and business-level indicators. For example, improving latency by as little as 0.1 latency is the number one reason consumers abandon mobile sites. Meanwhile, in the U.S.,

Benchmarking 191

Benchmarking Latency Speed Software 191

Speed Curve

MARCH 11, 2024

After years of development and testing, Google has added Interaction to Next Paint (INP) to its trifecta of Core Web Vitals – the performance metrics that are a key ingredient in its search ranking algorithm. INP replaces First Input Delay (FID) as the Vitals responsiveness metric. This is what the INP metric assesses."

Mobile 81

Mobile Google Metrics Monitoring 81

Dynatrace

DECEMBER 2, 2021

These can include business metrics, such as conversion rates, uptime, and availability; service metrics, such as application performance; or technical metrics, such as dependencies to third-party services, underlying CPU, and the cost of running a service. What are SLIs? For example, if your SLO is to deliver 99.5%

Metrics 200

Metrics Best Practices DevOps Infrastructure 200

Dynatrace

FEBRUARY 2, 2022

service availability with <50ms latency for an application with no revenue impact. However, another of the common SLO pitfalls is that many organizations assemble these metrics manually using disparate tools, which can take time from innovation. This can create an unnecessary distraction and steal time away from critical tasks.

DevOps 205

DevOps Metrics Best Practices Latency 205

Testsigma

AUGUST 24, 2020

Continuous Testing is the process of testing at all stages of software development – one after the another- without any human intervention. Continuous Testing is key to faster delivery of Agile products to the market. But the path to achieving Continuous Testing has its own challenges, most common of which are mentioned below.

Testing 69

Testing Open Source Scalability Latency 69

CSS Wizardry

APRIL 22, 2020

This is because file-size is only one aspect of web performance, and whatever the file-size is, the resource is still sat on top of a lot of other factors and constants—latency, packet loss, etc. With those requirements in place, I grabbed a selection of origins and began testing: m.facebook.com. Running the Tests. yandex.com.

Latency 269

Latency Servers Website Speed 269

Percona

JUNE 22, 2023

This includes metrics such as query execution time, the number of queries executed per second, and the utilization of query cache and adaptive hash index. Replication lag can occur due to various factors such as network latency, system resource limitations, complex transactions, or heavy write loads on the primary/master database.

Performance 105

Performance Monitoring Traffic Database 105

Testsigma

DECEMBER 12, 2020

This results in cross-browser compatibility issues and testing them out is cross-browser testing. But just like any other testing paradigm, cross-browser testing is full of challenges and we will explore them in this post along with some arrangements that can help smoothen the ride a bit! What is Cross-Browser Testing?

Testing 53

Testing Operating System Website Latency 53

The Netflix TechBlog

OCTOBER 19, 2020

If we had an ID for each streaming session then distributed tracing could easily reconstruct session failure by providing service topology, retry and error tags, and latency measurements for all service calls. Using simple lookup indices in Cassandra gives us the ability to maintain acceptable read latencies while doing heavy writes.

Infrastructure 233

Infrastructure Transportation Storage Open Source 233

The Morning Paper

OCTOBER 6, 2019

Prediction serving latency matters. Test the business impact of your models using randomised controlled trials (follows from #2). Booking.com estimate the value delivered by a model through randomized controlled trials which measure the impact on business metrics. Lesson 4: prediction serving latency matters.

Latency 102

Latency Metrics Cache Design 102

KeyCDN

AUGUST 15, 2019

Web performance is a broad subject, and you’ll find no shortage of performance testing tips and tutorials all over the web. Before you begin tuning your website or application, you must first figure out which metrics matter most to your users and establish some achievable benchmarks. What is Performance Testing?

Testing Tools 55

Testing Tools Best Practices Performance Testing Testing 55

Speed Curve

DECEMBER 4, 2023

Earlier this year, when Google announced that Interaction to Next Paint (INP) will replace First Input Delay (FID) as the responsiveness metric in Core Web Vitals in *gulp* March of 2024, we had a lot to say about it. TLDR: FID doesn't correlate with real user behavior, so we don't endorse it as a meaningful metric.) for mobile.

Mobile 54

Mobile Performance Metrics Google 54

Dotcom-Montior

NOVEMBER 16, 2021

SLIs are the actual performance metrics of your services. For example, if your SLO states that your uptime must be 99.9%, the actual SLI must meet or exceed that performance metric in order meet that specific SLO. An agreement within the SLA that states specific metric, like uptime, response time, security, issue resolution, etc.

Monitoring 91

Monitoring Google DevOps Engineering 91

CSS - Tricks

JULY 25, 2019

Lighthouse records metrics from the browser, applies a scoring model to them, and presents an overall performance score. Guidelines for improvement are suggested based on how specific metrics score. During performance tests, Lighthouse records many metrics focused on what a user sees and experiences. In PageSpeed 5.0,

Google 71

Google Engineering Speed Mobile 71

Smashing Magazine

AUGUST 15, 2023

Large preview ) While browsers are generally pretty fast, these steps still take time to load, typically in seconds, and even longer on slower, high-latency network connections. So noticeable, in fact, that Core Web Vitals has a metric all about it called Largest Contentful Paint (LCP). We can test for LCP in a number of ways.

Media 73

Media Metrics Mobile Best Practices 73

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.

Traffic 353

Traffic Latency Cache Metrics 353

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 279

Traffic Metrics Systems Strategy 279

CSS Wizardry

OCTOBER 16, 2023

In one test, I concatenated it all into one big file, and the other had the library split into 12 files. Read the complete test methodology. Plotted on the same horizontal axis of 1.6s, the waterfalls speak for themselves: 201ms of cumulative latency; 109ms of cumulative download. This will be referred to as css_time.

Cache 291

Cache Latency Strategy Speed 291

Scalegrid

APRIL 16, 2020

Deploying your application and database on the same VPC also provides the lowest possible latency path. Use Follower Clusters keep two independent database systems (of the same type) in sync so you can analyze, optimize and test app performance for MySQL, PostgreSQL and MongoDB® database. Expert Tip. Security Groups. Learn more.

Cloud 242

Cloud Azure AWS Database 242

HammerDB

OCTOBER 23, 2023

Stored Procedures and Client SQL comparison To test the stored procedures and client implementations, we ran both workloads against a system equipped with Intel Xeon 8280L. The data shows a scripted automated workload running a number of back to back tests each time with an increasing number of virtual users. On MySQL, we saw a 1.5X

Benchmarking 62

Benchmarking Database Network C++ 62

Dynatrace

OCTOBER 1, 2021

In IT and cloud computing, observability is the ability to measure a system’s current state based on the data it generates, such as logs, metrics, and traces. DevSecOps teams can tap observability to get more insights into the apps they develop, and automate testing and CI/CD processes so they can release better quality code faster.

Metrics 363

Metrics Open Source Monitoring Infrastructure 363

Dynatrace

JUNE 1, 2023

Certain SLOs can help organizations get started on measuring and delivering metrics that matter. With this objective, the app ensures that users experience real-time feedback and immediate updates when logging workouts, recording sets and reps, or tracking performance metrics. Latency primarily focuses on the time spent in transit.

Latency 185

Latency Website Traffic Virtualization 185

Dynatrace

JUNE 1, 2023

Certain service-level objective examples can help organizations get started on measuring and delivering metrics that matter. With this objective, the app ensures that users experience real-time feedback and immediate updates when logging workouts, recording sets and reps, or tracking performance metrics.

Traffic 174

Traffic Latency Website Virtualization 174

Dotcom-Montior

DECEMBER 8, 2021

In a different article, we talked about chaos engineering and how SRE teams proactively seek out and test for failures to prevent the worst from happening. Knowing when and where an error, downtime, or application latency occurs is a critical factor in limiting the impact to users and customers.

Social Media 90

Social Media Monitoring Latency DevOps 90

Tim Kadlec

JUNE 24, 2014

Mobile networks add a tremendous amount of latency. Test across devices to experience what your users are experiencing. Not testing on multiple devices can cost much more than the cost of building a device lab. Etsy notifies developers whenever one of the metrics exceeds a performance goal. We are not our end users.

Google 49

Google Performance Latency Internet 49

Dynatrace

FEBRUARY 15, 2023

SREs use Service-Level Indicators (SLI) to see the complete picture of service availability, latency, performance, and capacity across various systems, especially revenue-critical systems. Additionally, you can easily use any previously defined metrics and SLOs from your environments.

DevOps 227

DevOps Latency Traffic Best Practices 227