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. The standard dictionary subscript notation is also available. this could take a few minutes) All packages already cached in s3.

Best Practices 200

Best Practices Cache Metrics Code 200

CSS Wizardry

MAY 31, 2019

Users might already have the file cached. If website-a.com links to [link] , and a user goes from there to website-b.com who also links to [link] , then the user will already have that file in their cache. Penalty: Caching. This makes it very safe and sensible to enforce a reasonably aggressive cache policy. to just 3.6s.

Cache 277

Cache Latency Infrastructure Website 277

High Scalability

FEBRUARY 17, 2021

This article is to simply report the YCSB bench test results in detail for five NoSQL databases namely Redis, MongoDB, Couchbase, Yugabyte and BangDB and compare the result side by side. I have also used the default six test scenarios as defined by the YCSB framework. I have restricted it to 10M records for each test.

Benchmarking 308

Benchmarking Latency C++ Database 308

Dynatrace

JANUARY 31, 2024

The RAG process begins by summarizing and converting user prompts into queries that are sent to a search platform that uses semantic similarities to find relevant data in vector databases, semantic caches, or other online data sources. Observing AI models Running AI models at scale can be resource-intensive.

Cache 276

Cache Azure Infrastructure Monitoring 276

DZone

OCTOBER 11, 2022

Making Google’s CalDAV and CardDAV APIs available for everyone ( Google Developers Blog). Improving testing by using real traffic from production ( Hacker News). Pandora launches new HTML5 site for TVs and gaming consoles, available now on PS3 and Xbox 360 ( The Next Web). History of Lisp ( Hacker News). Hacker News).

Java 244

Java Best Practices Google Analytics 244

Dynatrace

SEPTEMBER 2, 2020

As part of the Platform Extensions team, I’m one of those responsible for services that include the Dynatrace OneAgent SDKs, which are libraries that allow us to extend end-to-end visibility for technologies and frameworks for which there is no code module available yet. Now the application is running, let’s test it!

Monitoring 279

Monitoring Cache Open Source Database 279

The Netflix TechBlog

MAY 4, 2023

This blog post will provide a detailed analysis of replay traffic testing, a versatile technique we have applied in the preliminary validation phase for multiple migration initiatives. In this testing strategy, we execute a copy (replay) of production traffic against a system’s existing and new versions to perform relevant validations.

Traffic 343

Traffic Latency Tuning Systems 343

Dynatrace

JANUARY 16, 2023

That trend will likely continue as Kubernetes security awareness further rises and a new class of security solutions becomes available. Of the organizations in the Kubernetes survey, 71% run databases and caches in Kubernetes, representing a +48% year-over-year increase. Databases : Among databases, Redis is the most used at 60%.

Open Source 358

Open Source Java Operating System Programming 358

The Netflix TechBlog

JUNE 4, 2019

Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains. CFS is widely used and therefore well tested and Linux machines around the world run with reasonable performance.

Cache 255

Cache Latency Airlines Logistics 255

Smashing Magazine

MAY 9, 2022

Performance Game Changer: Browser Back/Forward Cache. Performance Game Changer: Browser Back/Forward Cache. With that caveat out of the way, let’s get to the guts of the article: What is the Back/Forward Cache and why does it matter so much? Didn’t The HTTP Cache Do All That Anyway? Barry Pollard.

Cache 106

Cache Games Performance Website 106

The Netflix TechBlog

OCTOBER 29, 2020

This translates to a large number of app configurations to toggle feature availability and optimize the in-app experience for each production. These expressions are evaluated in the current app session context, and can access data such as A/B test assignments, locality, device attributes, etc.

Mobile 279

Mobile Cache Network Technology 279

Scalegrid

JULY 8, 2020

If you must kill the script at this point, there are two options available: SCRIPT KILL command can be used to stop a script that hasn’t yet done any writes. The complete information on methods to kill the script execution and related behavior are available in the documentation. Behavior on Sentinel-Monitored High Availability Systems.

Servers 239

Servers Database Availability Monitoring 239

Dynatrace

APRIL 10, 2023

We also couldn’t compromise on performance and availability.” ” Uninterrupted testing and multicloud observability Cluster monitoring also helped the company avoid performance issues during the A/B testing it conducted to evaluate the user experience. ” Three years ago, Tractor Supply Co.

Cloud 243

Cloud Ecommerce Performance Retail 243

Percona

JUNE 22, 2023

To make data count and to ensure cloud computing is unabated, companies and organizations must have highly available databases. This guide provides an overview of what high availability means, the components involved, how to measure high availability, and how to achieve it. How does high availability work?

Availability 132

Availability Database Open Source Hardware 132

The Netflix TechBlog

SEPTEMBER 8, 2020

This allows the app to query a list of “paths” in each HTTP request, and get specially formatted JSON (jsonGraph) that we use to cache the data and hydrate the UI. For the migration, testing was a first-class citizen. Replay Testing Enter replay testing.

Latency 237

Latency Cache Java Traffic 237

The Netflix TechBlog

JULY 1, 2019

While web browsers and mobile phones have gigabytes of memory available for graphics, our devices are constrained to mere MBs. Our UI runs on top of a custom rendering engine which uses what we call a “surface cache” to optimize our use of graphics memory. The majority of legacy devices run at 28MB of surface cache.

Cache 166

Cache Design Testing Development 166

CSS Wizardry

NOVEMBER 9, 2018

It is imperative that you test this pattern against your own specific use-case: there could be different results depending on whether or not there are large differences in file-size and execution costs between your before-CSS JavaScript file and the CSS itself. Test, test, test. Test and measure.

Network 279

Network Performance Media Cache 279

The Netflix TechBlog

SEPTEMBER 18, 2024

Central to this infrastructure is our use of multiple online distributed databases such as Apache Cassandra , a NoSQL database known for its high availability and scalability. Although clock-based token generation can suffer from clock skew, our tests on EC2 Nitro instances show drift is minimal (under 1 millisecond).

Latency 256

Latency Storage Cache Servers 256

Dean Hume

MAY 16, 2018

Have you ever been on a website and noticed a popup notification that suggests that there is a new version of the site available? This is where a pop up notification like Google’s Inbox provides the user with a means of always having the latest version of cached resources. then(cache => cache.addAll([ './dog.jpg'

Availability 100

Availability Cache Code Google 100

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 305

AWS Efficiency Azure Cloud 305

Dynatrace

NOVEMBER 28, 2022

Lambda then takes a snapshot of the memory and disk state of the initialized execution environment, persists the encrypted snapshot, and caches it for low-latency access. In our internal testing of SnapStart, we noticed an improved time of 200 to 300 milliseconds in P90 when compared to Lambda On-Demand; however, your results may vary.

Lambda 246

Lambda AWS Serverless Latency 246

Percona

APRIL 7, 2023

Here’s how the same test performed when running Percona Distribution for PostgreSQL 14 on these same servers: Queries: reads Queries: writes Queries: other Queries: total Transactions Latency (95th) MySQL (A) 1584986 1645000 245322 3475308 122277 20137.61 The throughput didn’t double but increased by 57%. Why is that?

Tuning 145

Tuning Cache Servers Benchmarking 145

The Netflix TechBlog

OCTOBER 16, 2019

One example displaying the need for dataset propagation: at any given time Netflix runs a very large number of A/B tests. These tests span multiple services and teams, and the operators of the tests need to be able to tweak their configuration on the fly. Many of these use cases can be loosely grouped as “configuration”?—?for

Cache 189

Cache Architecture Metrics Java 189

Dynatrace

APRIL 21, 2022

Missing caching layers. With the reliability pillar of the Well-Architected Framework, organizations must ensure they build resilient and available applications. Some principles Microsoft provides to help organizations across this area include: Define and test availability targets such as service level agreements (SLAs) and SLOs.

Azure 246

Azure Monitoring Virtualization Metrics 246

Percona

APRIL 6, 2023

Query caching Pgpool-II can cache frequently used queries in memory, reducing the load on your PostgreSQL servers and improving response times. This means that when a query is executed, pgpool-II can check the cache first to see if the results are already available rather than sending the query to the database server.

Cache 138

Cache Open Source Benchmarking Database 138

Dynatrace

JUNE 18, 2019

Moreover, features like Instant Run and the Gradle Build Cache weren’t supported. Out-of-the-box support for Instant Run and the Gradle Build Cache make the auto-instrumentation process barely noticeable. For bytecode instrumentation, we rely on a well-tested framework that’s also the foundation of the OneAgent Java module.

Cache 35

Cache Java Monitoring Tuning 35

Scalegrid

APRIL 16, 2020

Each of these models is suitable for production deployments and high traffic applications, and are available for all of our supported databases, including MySQL , PostgreSQL , Redis™ and MongoDB® database ( Greenplum® database coming soon). This becomes really important for cache solutions like Redis™. Startup Hosting Credits.

Cloud 242

Cloud Azure AWS Database 242

The Netflix TechBlog

JULY 21, 2022

More importantly, the low resource availability or “out of memory” scenario is one of the common reasons for crashes/kills. Some features (as an example) include Device Type ID, SDK Version, Buffer Sizes, Cache Capacities, UI resolution, Chipset Manufacturer and Brand. Restricting Testing and Analysis to one day and device at a time.

Big Data 184

Big Data Cache Engineering Data Engineering 184

Percona

MARCH 27, 2023

A lot of useful information can be retrieved from this schema, for example, table metadata and foreign key relations, but trying to query I_S can induce performance degradation if your server is under heavy load, as shown in the following example test. The same tests have been executed in Percona Server for MySQL 5.7

Cache 124

Cache Hardware Servers Benchmarking 124

Dynatrace

NOVEMBER 13, 2020

By adding Flutter support, we’re giving you more freedom to choose what best fits your use case and available resources. Test Flutter monitoring with our demo app. To get you up to speed quickly and to test Dynatrace easily, we provide a small Flutter demo app. What’s next.

Code 244

Code Mobile Monitoring Infrastructure 244

CSS Wizardry

AUGUST 13, 2019

There was no appetite from them to do so, so I decided to make it all available for free anyway—a faster web benefits everyone. I was doing some cursory research and running a few tests against a potential client’s site so as to get a good understanding of the shape of things before we were to work together. Can you see it?

Latency 213

Latency Cache Strategy Media 213

SQL Performance

APRIL 13, 2020

His version can be used for the plan cache – the only challenge there is the information is transient, so you may not capture every query that uses a particular index. If possible, I'll also consider execution counts (from Query Store or the plan cache) to not just understand what query uses an index, but how frequently that query executes.

Tuning 137

Tuning Cache Metrics Testing 137

Smashing Magazine

NOVEMBER 8, 2021

But then, quickly advances to contextual pricing, juggling complexity of large and frequently updated product catalog, managing continuously running multivariate tests and promotion campaigns, and serving customer-tailored dynamic recommendations. The journey, often, starts “simple” with localization. Large preview ). You need both.

Cache 139

Cache Best Practices Strategy Servers 139

Dynatrace

NOVEMBER 5, 2019

Available as an agent installer). Our DEM offering also includes: Synthetics – Run browser-based workflow tests from multiple geographic locations for scoring availability of your applications before end-users experience issues. Dependency agent Installation – Maps connections between servers and processes.

Azure 198

Azure Artificial Intelligence Metrics Innovation 198

KeyCDN

SEPTEMBER 3, 2020

How to measure performance The Website Speed Test is the ideal tool for measuring the performance of your website. Even if a browser doesn't support WebP, our WebP caching feature will ensure that the correct image format is delivered. WebP delivery doesn't require any change on the origin server with the WebP caching feature.

Processing 127

Processing Cache Website Servers 127

Dynatrace

JANUARY 23, 2023

These include improving API traffic management and caching mechanisms to reduce server and network load, optimizing database queries, and adding additional compute resources, just to name some. While some of these are already done, such as adding additional compute, others require more development and testing.

Social Media 130

Social Media Cache Traffic Media 130

KeyCDN

FEBRUARY 4, 2021

For example, if a lookup fails and times out to your first DNS server it queries the next DNS server until the correct IP address is returned, or it is unable to resolve as seen in the infamous "This webpage is not available" error below. You can test the DNS lookup time and TTFB with a website speed test tool.

Cache 134

Cache Website Internet Internet 134