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 200

Engineering Performance Metrics Best Practices 200

The Netflix TechBlog

NOVEMBER 15, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , Michael Lindon , and Colin McFarland This is the fifth 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?),

Metrics 215

Metrics Testing Innovation Design 215

Dynatrace

JULY 13, 2021

As organizations aim for faster delivery of value to their customers, the frequency of releases inevitably increases, which introduces risks and uncertainty into production systems—unless automated tests and quality gates can be leveraged to provide confidence. Automated comparison of different timeframes based on SLIs and SLOs.

Cloud 245

Cloud DevOps Benchmarking Speed 245

The Netflix TechBlog

JANUARY 24, 2022

Technically, “performance” metrics are those relating to the responsiveness or latency of the app, including start up time. At Netflix the term “performance” usually encompasses both performance metrics (in the strict meaning) and memory metrics, and that’s how we’re using the term here. What are the Performance Tests?

Performance 210

Performance Performance Testing Metrics Testing 210

DZone

FEBRUARY 27, 2021

There were languages I briefly read about, including other performance comparisons on the internet. According to other comparisons [Google for 'Performance of Programming Languages'] spread over the net, they clearly outshine others in all speed benchmarks. Input The input will contain several test cases (not more than 10).

Java 214

Java C++ Benchmarking Programming 214

Dynatrace

JUNE 4, 2024

Consequently, this blog post highlights the new capability of the Site Reliability Guardian to define auto-adaptive thresholds that tackle the challenge of configuring static thresholds and protect your quality and security investments with relative comparisons to previous validations.

Metrics 244

Metrics Engineering Code Tuning 244

Dynatrace

APRIL 21, 2022

Most monitoring tools for migrations, development, and operations focus on collecting and aggregating the three pillars of observability— metrics, traces, and logs. Using a data-driven approach to size Azure resources, Dynatrace OneAgent captures host metrics out-of-the-box to assess CPU, memory, and network utilization on a VM host.

Azure 201

Azure Monitoring Virtualization Metrics 201

Dynatrace

FEBRUARY 15, 2023

SREs face ever more challenging situations as environment complexity increases, applications scale up, and organizations grow: Growing dependency graphs result in blind spots and the inability to correlate performance metrics with user experience. Additionally, you can easily use any previously defined metrics and SLOs from your environments.

DevOps 230

DevOps Latency Traffic Best Practices 230

The Netflix TechBlog

NOVEMBER 29, 2023

A vital aspect of such development is subjective testing with HDR encodes in order to generate training data. The pandemic, however, posed unique challenges in conducting a conventional in-lab subjective test with HDR encodes. A/B testing also allows us to get a read on the improvement in quality of experience (QoE).

Open Source 262

Open Source Software Engineering Internet Internet 262

Dynatrace

JANUARY 16, 2023

In comparison, on-premises clusters have more and larger nodes: on average, 9 nodes with 32 to 64 GB of memory. This trend shows that organizations are dedicating significantly more Kubernetes clusters to running software build, test, and deployment pipelines. Kubernetes infrastructure models differ between cloud and on-premises.

Open Source 351

Open Source Java Operating System Programming 351

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. In our specific examples above, the one-big-file pattern incurred 201ms of latency, whereas the many-files approach accumulated 4,362ms by comparison. This will be referred to as css_time.

Cache 338

Cache Latency Strategy Speed 338

Dynatrace

MAY 24, 2023

Not only do operations personnel now have an easier time deploying synthetic tests faster with fewer resources, it’s also no longer necessary to track utilization. Kubernetes takes care of keeping the necessary minimum number of nodes alive for executing all the tests assigned to a location.

Scalability 220

Scalability Virtualization Monitoring Open Source 220

The Netflix TechBlog

AUGUST 24, 2022

Metric A slate recommendation algorithm generates slates and then the user model is used to predict the success/failure of each slate. We compare the change in this metric for different user budget distributions. Paired comparison between RL and Contextual bandit. This is known as the SARSA algorithm.

Metrics 188

Metrics Systems Architecture Processing 188

Scalegrid

NOVEMBER 4, 2024

We use Sysbench to benchmark key performance metrics under different workloads and thread configurations, including Transactions Per Second (TPS) and Queries Per Second (QPS). Key metrics include TPS and QPS. It simulates high-concurrency environments, making it a go-to for performance testing of PostgreSQL across cloud platforms.

Benchmarking 130

Benchmarking AWS Tuning Metrics 130

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. To observe model drift and accuracy, companies can use holdout evaluation sets for comparison to model data.

Cache 215

Cache Azure Infrastructure Monitoring 215

Dynatrace

OCTOBER 30, 2023

In a unified strategy, logs are not limited to applications but encompass infrastructure, business events, and custom metrics. Establish buckets for each cost center Establish buckets for each cost center or specific IT environment (production and staging vs. development and testing) within your organization. Set up processing rules.

Best Practices 256

Best Practices Analytics Artificial Intelligence Infrastructure 256

The Netflix TechBlog

DECEMBER 10, 2020

The increasing vastness and diversity of what our members are watching make answering these questions particularly challenging using conventional methods, which draw on a limited set of comparable titles and their respective performance metrics (e.g., box office, Nielsen ratings). This challenge is also an opportunity.

Entertainment 245

Entertainment Architecture Network Open Source 245

Dynatrace

FEBRUARY 10, 2021

Automated release inventory and version comparison , which allows teams to easily evaluate the performance of individual release versions, and as needed, roll back to a previous version. Automated release inventory and version comparison. ” – Wim Verhaeghe, KBI-Connect DevOps team lead at Inetum-Realdolmen.

Cloud 177

Cloud DevOps Speed Metrics 177

Smashing Magazine

MARCH 2, 2021

The State Of Mobile And Why Mobile Web Testing Matters. The State Of Mobile And Why Mobile Web Testing Matters. And to ensure the quality of a product, we always need to test — on a number of devices, and in a number of conditions. What’s a representative device to test on in 2021? Driving Business Metrics.

Mobile 136

Mobile Testing Website Benchmarking 136

Dynatrace

JULY 9, 2020

Gone are the days for Christian manually looking at dashboards and metrics after a new build got deployed into a testing or acceptance environment: Integrating Keptn into your existing DevOps tools such as GitLab is just a matter of an API call. Comparison across builds. Heatmap and chart visualization in the Keptn Bridge.

Cloud 198

Cloud DevOps Architecture Azure 198

Speed Curve

APRIL 14, 2024

This can have an impact on most metrics – such as Start Render and Largest Contentful Paint – downstream. Masking third-party performance Assuming that you have visibility into your third-party performance is another pitfall when testing the first view of a site synthetically. How do I bypass the CMP? It's been said before.

Performance 131

Performance Best Practices Metrics Internet 131

Dynatrace

AUGUST 14, 2023

A/B testing allows organizations to compare two versions of a web or app experience and then determine which one performs better. Metrics like the net promoter score (NPS) or customer satisfaction (CSAT) score encapsulate this kind of customer feedback into measurable analytics.

Analytics 238

Analytics Social Media Website IoT 238

Dynatrace

JANUARY 31, 2024

In the age of AI, data observability has become foundational and complementary to AI observability, data quality being essential for training and testing AI models. Scenario : For many B2B SaaS companies, the number of reported customers is an important metric.

DevOps 203

DevOps Analytics Airlines Metrics 203

The Netflix TechBlog

NOVEMBER 2, 2021

Perceptual quality measurements are used to drive video encoding optimizations , perform video codec comparisons , carry out A/B testing and optimize streaming QoE decisions to mention a few. In particular, the VMAF metric lies at the core of improving the Netflix member’s streaming video quality. 4a & 4b. 4c & 5.

Media 180

Media Innovation Metrics Latency 180

The Netflix TechBlog

MARCH 13, 2020

In the plot, the Y-axis shows the additional bitrate in percent needed to achieve similar quality as libaom encoder according to three metrics. Reducing BD-rate between SVT-AV1 and libaom in 2-pass encoding mode The comparison results of the SVT-AV1 against libaom on objective-1-fast test set are presented in the table below.

Open Source 160

Open Source Efficiency C++ Speed 160

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. QoE is measured with a compilation of metrics that describe everything about the user’s experience from the time they press play until the time they finish watching.

Metrics 147

Metrics Strategy Testing Efficiency 147

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. QoE is measured with a compilation of metrics that describe everything about the user’s experience from the time they press play until the time they finish watching.

Metrics 143

Metrics Strategy Testing Efficiency 143

Dynatrace

OCTOBER 5, 2020

The challenge with ASP.NET Web Service Observability, Diagnostics and Performance Optimization is that most monitoring & diagnostic tools only provide global Service Level Indicators metrics (SLIs) such as response time, failure rate, and throughput, but not metrics for each individual service endpoint.

Performance 153

Performance Best Practices Architecture Monitoring 153

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. QoE is measured with a compilation of metrics that describe everything about the user’s experience from the time they press play until the time they finish watching.

Metrics 130

Metrics Strategy Testing Efficiency 130

Speed Curve

APRIL 27, 2022

But as you can see in these filmstrips of Wiggle, a UK cycling retailer, hiding the page can have a dramatic impact on a visitor's experience: Comparison of a site loading with (top) and without (bottom) the anti-flicker snippet enabled. The test in top row has the anti-flicker snippet in place. before the hero image. Using the data.

Performance 145

Performance C++ Google Retail 145

Highly Scalable

MAY 1, 2012

On the other hand, when one is interested only in simple additive metrics like total page views or average price of conversion, it is obvious that raw data can be efficiently summarized, for example, on a daily basis or using simple in-stream counters. Counters on each position are incremented. Heavy Hitters: Stream-Summary.

Analytics 191

Analytics Traffic Big Data Efficiency 191

Smashing Magazine

AUGUST 10, 2023

Running A Page Speed Test: Monitoring vs. Measuring Running A Page Speed Test: Monitoring vs. Measuring Geoff Graham 2023-08-10T08:00:00+00:00 2023-08-10T12:35:05+00:00 This article is sponsored by DebugBear There is no shortage of ways to measure the speed of a webpage. Lighthouse results. And kept doing that over time.

Speed 82

Speed Monitoring Testing Network 82

Dynatrace

MARCH 10, 2021

They collect metrics and raise alerts, but they provide few answers as to what went wrong in the first place. To start, let’s look at the illustration below to see how these two operate in comparison: Also to note on traditional machine learning: by its very nature of operation it is slow and less agile.

AWS 148

AWS Cloud Artificial Intelligence Innovation 148

Percona

MARCH 17, 2023

PMM2 uses VictoriaMetrics (VM) as its metrics storage engine. We have tested PMM version 2.33.0 Please note that the focus of these tests was around standard metrics gathering and display, we’ll use a future blog post to benchmark some of the more intensive query analytics (QAN) performance numbers.

Monitoring 106

Monitoring Scalability Database Cache 106

MachMetrics

FEBRUARY 22, 2019

It’s one of the most frequently asked questions I see asked, “I’ve tested my site speed, so now what do these metrics mean?” Here we’ll explain what each of the common web performance metrics mean, and how can you use that data to optimize your site and make it faster. Standard Website Speed Metrics.

Speed 56

Speed Metrics Website Cache 56

Testsigma

SEPTEMBER 2, 2021

Automated web testing is not a new concept today. With advancements in web development technologies and how complex web codes are written today, web testing was bound to walk this way sooner or later. Factors affecting ROI in automated web testing. First of all, we need people that can perform automated web testing.

Strategy 71

Strategy Testing Cloud Virtualization 71

Speed Curve

SEPTEMBER 25, 2018

This gives us a relatively unique opportunity to analyse and aggregate performance metrics to gain some interesting insights. In this post, I'm going to analyse some browser-based paint timing metrics: First Paint & First Contentful Paint (defined in the Paint Timing spec and implemented in Chromium). What are paint timing metrics?

Metrics 49

Metrics Performance Testing Testing Internet 49