The Netflix TechBlog

NOVEMBER 4, 2019

No single service has complete context into how the system works. Best of all, our page can load much faster since everything is cached in Elasticsearch. Once all documents have been indexed with no errors, we swap the alias from the currently active index to the newly built index. Our data changes constantly?—?

Cache 248

Cache Database Servers Performance 248

Scalegrid

JULY 8, 2020

In this post, we will explain the Redis transactional property of scripts, what this error is about, and why we must be extra careful about it on Sentinel-managed systems that can failover. The complete information on methods to kill the script execution and related behavior are available in the documentation. Demonstration.

Servers 239

Servers Database Availability Monitoring 239

The Netflix TechBlog

DECEMBER 19, 2024

Many of these projects are under constant development by dedicated teams with their own business goals and development best practices, such as the system that supports our content decision makers , or the system that ranks which language subtitles are most valuable for a specific piece ofcontent.

Best Practices 145

Best Practices Cache Metrics Code 145

Scalegrid

MAY 11, 2024

The default storage engine in earlier versions was MMAPv1, which utilized memory-mapped files and document-level locking. It uses a filesystem cache and write-ahead log for crash recovery. However, keep in ming that it does not release space to the operating system. Compaction operation defragments data files & indexes.

Storage 130

Storage Engineering Cache Database 130

Dynatrace

DECEMBER 20, 2021

In practice, session recording solutions make use of the document object model (DOM), which is a programming interface for web pages and document. Streamlined asset caching: Asset caching is critical for creating accurate replays. Make sure you know what assets your replay tool is recording and how you can access them.

Mobile 255

Mobile Website Analytics Cache 255

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. You can find a lot more details about how this works in the Spinnaker canaries documentation. This meant that data that was static (e.g.

Latency 243

Latency Cache Java Traffic 243

The Netflix TechBlog

JULY 1, 2019

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. Surface Cache Surface cache is a reserved pool in main memory (or separate graphics memory on a minority of systems) that the Netflix app uses for storing textures (decoded images and cached resources).

Cache 167

Cache Design Testing Development 167

The Netflix TechBlog

MARCH 7, 2023

We store all OperationIDs which are in STARTED state in a distributed cache (EVCache) for fast access during searches. This API finds all Elasticsearch documents with ID1 and marks isAnnotationOperationActive=FALSE. We do that by excluding the following from all queries in our system.

Media 275

Media Latency Architecture Database 275

The Netflix TechBlog

OCTOBER 8, 2024

Note: Contrary to what the name may suggest, this system is not built as a general-purpose time series database. Those use cases are well served by the Netflix Atlas telemetry system. Effectively managing this data at scale to extract valuable insights is crucial for ensuring optimal user experiences and system reliability.

Latency 242

Latency Storage Traffic Tuning 242

Dynatrace

OCTOBER 15, 2021

Loosely defined, observability is the ability to understand what’s happening inside a system from the knowledge of the external data it produces, which are usually logs, metrics, and traces. Source: OpenTelemetry Documentation. OTel is a specialized protocol for collecting telemetry data and exporting it to a target system.

Open Source 230

Open Source Metrics Cloud Transportation 230

Dynatrace

APRIL 7, 2022

Spring Boot 2 uses Micrometer as its default application metrics collector and automatically registers metrics for a wide variety of technologies, like JVM, CPU Usage, Spring MVC, and WebFlux request latencies, cache utilization, data source utilization, Rabbit MQ connection factories, and more. To learn more, see our documentation.

Metrics 130

Metrics Java Latency Cache 130

Dynatrace

APRIL 7, 2022

Spring Boot 2 uses Micrometer as its default application metrics collector and automatically registers metrics for a wide variety of technologies, like JVM, CPU Usage, Spring MVC, and WebFlux request latencies, cache utilization, data source utilization, Rabbit MQ connection factories, and more. To learn more, see our documentation.

Metrics 130

Metrics Java Latency Cache 130

Smashing Magazine

JULY 6, 2021

This data would be collated and authored in a Web Content Management System (WCMS) by a content editor. We had marketers from a Traditional CMS background who resisted the idea of delving into multiple systems and services when using a headless CMS. Comprehensive documentation and code samples are also a must. Content Previews.

Cache 144

Cache Website Mobile Google 144

Dynatrace

OCTOBER 15, 2020

Statically linked application binaries have their merits; they’re self-contained and they don’t have dependencies on the systems they’re deployed to. From http.Transport documentation : By default, Transport caches connections for future reuse. is used to enforce a statically linked foxy executable.

Transportation 188

Transportation Monitoring Metrics Code 188

Percona

NOVEMBER 1, 2023

Without going further into the reasons for such a need, I wanted to refresh this subject in terms of overhead related to running the command on production systems. A lot has changed since then, but many production systems alive today still run with affected versions. sbtest1 | analyze | status | OK | + -+ + -+ -+ 1 row in set (0.00

Servers 103

Servers Database Cache C++ 103

Smashing Magazine

SEPTEMBER 28, 2022

On design systems, UX, web performance and CSS/JS. Jamstack is popular with documentation sites that usually compile code to HTML files and host them on the CDN. Active Memory Caching. When you want to get data that you already had quickly, you need to do caching — caching stores data that a user recently retrieved.

Cache 128

Cache Performance Servers Architecture 128

Smashing Magazine

DECEMBER 23, 2020

The service workers enable the offline usage of the PWA by fetching cached data or informing the user about the absence of an Internet connection. When developing a PWA, you can cache the application shell’s resources and assets in the browser. Cached content with IndexedDB. Cache first, then network. Service Workers.

Cache 126

Cache Internet Internet Google 126

Brendan Gregg

JULY 2, 2021

This is also applicable for people adding it to their own in-house monitoring systems. You likely already have agents running on all your customer systems. There are so many options it's really your own preference based on your existing system and customer environments. cachestat File system cache statistics line charts.

Latency 144

Latency Cache Energy Systems 144

Smashing Magazine

MAY 16, 2022

This allows resource requests, including the HTML document itself, to be enriched with data during its lifecycle, and that information can be inspected for measuring the attributes of that resource! For the top-level HTML document, it is fetched upon user navigation but is still a resource request.

Servers 95

Servers Monitoring Cache Network 95

Tim Kadlec

MARCH 19, 2018

How well does AMP perform when the library is served using the AMP cache? But what you don’t see is that Google gets that instantaneous loading by actively preloading AMP documents in the background. In the case of the search carousel, it’s literally an iframe that gets populated with the entirety of the AMP document.

Cache 79

Cache Google Speed Metrics 79

Smashing Magazine

AUGUST 20, 2021

During the 90s, we saw two content management systems for static sites — Microsoft FrontPage in 1996 and Macromedia Dreamweaver in 1997. These desktop applications incremented the tooling an inch closer to the modern Jamstack content management systems of today. These use cases include: Documentation. Large preview ).

Ecommerce 140

Ecommerce Website Government Internet 140

Brendan Gregg

MARCH 16, 2024

The problem is that this system has a default libc that has been compiled without frame pointers, so any stack walking stops at the libc layer, producing a partial stack that's missing the application frames. This is pretty common and usually goes unnoticed as the flame graph looks ok at first glance. What are frame pointers?

Java 137

Java Cache Google Hardware 137

The Morning Paper

SEPTEMBER 24, 2019

50 ways to leak your data: an exploration of apps’ circumvention of the Android permissions system Reardon et al., Side-channels are typically an unintentional consequence of a complicated system. The OpenX SDK was found to be using the ARP cache side channel, and the code makes it clear the authors knew what they were doing.

Systems 74

Systems Traffic Network Google 74

The Netflix TechBlog

NOVEMBER 4, 2019

No single service has complete context into how the system works. Best of all, our page can load much faster since everything is cached in Elasticsearch. Once all documents have been indexed with no errors, we swap the alias from the currently active index to the newly built index. Our data changes constantly?—?

Cache 115

Cache Database Servers Performance 115

Abhishek Tiwari

NOVEMBER 3, 2018

Recently I was asked about content management systems (CMS) of the future - more specifically how they are evolving in the era of microservices, APIs, and serverless computing. Raw content data along with templates are version controlled using Git or similar versioning systems. can generate an HTML-only website without involving a CMS.

Systems 63

Systems Cache Website Network 63

The Netflix TechBlog

DECEMBER 17, 2019

In order to be supported, a database is required to fulfill a set of features that are commonly available in systems like MySQL, PostgreSQL, MariaDB, and others. We want to support these systems as a source so that they can provide their data for further consumption. Some of DBLog’s features are: Processes captured log events in-order.

Database 223

Database Traffic Transportation Open Source 223

Randon ASCII

JULY 11, 2022

Downloads go through the cache, the cache is saved to disk, and saves to disk are slowed by (some) anti-virus software. This table told me that if I’m spending 16% of a core on page faults then I’m probably also spending – hidden in the System process – about 13.7% The system process manages to consume 29 processors (!!!)

Cache 105

Cache Energy Processing Google 105

The Netflix TechBlog

DECEMBER 17, 2019

In order to be supported, a database is required to fulfill a set of features that are commonly available in systems like MySQL, PostgreSQL, MariaDB, and others. We want to support these systems as a source so that they can provide their data for further consumption. Some of DBLog’s features are: Processes captured log events in-order.

Database 209

Database Traffic Transportation Open Source 209

SQL Performance

SEPTEMBER 25, 2019

The general idea is to cache and replay results, saving repeated executions of inner-side operators wherever possible. When a spool is able to replay cached results, this is known as a rewind. You may find it helpful to think of a spool rebind as a cache miss, and a rewind as a cache hit. Lazy Table Spool.

Performance 104

Performance Cache Servers Education 104

All Things Distributed

JANUARY 18, 2012

Werner Vogels weblog on building scalable and robust distributed systems. The original Dynamo design was based on a core set of strong distributed systems principles resulting in an ultra-scalable and highly reliable database system. All Things Distributed. Amazon DynamoDB â?? By Werner Vogels on 18 January 2012 07:00 AM.

Scalability 164

Scalability Database Ecommerce Latency 164

Official Blog - World Web Technology

AUGUST 27, 2023

Also, high-quality documentation is available for developers with any development issues and queries. Also, there are tutorials, video forums, and documentation, making PHP development easy and troubleshooting more accessible. Various techniques, such as caching and optimization, improve the website’s performance and speed.

Development 98

Development Ecommerce Open Source Website 98

The Netflix TechBlog

NOVEMBER 4, 2019

No single service has complete context into how the system works. Best of all, our page can load much faster since everything is cached in Elasticsearch. Once all documents have been indexed with no errors, we swap the alias from the currently active index to the newly built index. Our data changes constantly?—?

Cache 100

Cache Database Servers Performance 100

Percona

MAY 2, 2023

ChatGPT: The InnoDB buffer pool is used by MySQL to cache frequently accessed data in memory. If we expand the cache concept more, the buffer pool could be even less if the working set (hot data) is smaller. Also, there is a documented bug: OPTIMIZE TABLE does not sort R-tree indexes, such as spatial indexes on POINT columns.

Social Media 126

Social Media Database Servers Cache 126

Smashing Magazine

OCTOBER 26, 2021

Nx is an open-source build framework that helps you architect, test, and build at any scale — integrating seamlessly with modern technologies and libraries, while providing a robust command-line interface (CLI), caching, and dependency management. Nx uses distributed graph-based task execution and computation caching to speed up tasks.

Cache 112

Cache Servers Code Testing 112

SQL Performance

OCTOBER 7, 2020

Its raison d’être is to cache result rows from a plan subtree, then replay those rows on subsequent iterations if any correlated loop parameters are unchanged. The documentation says only the following operators can rewind: Table Spool. I have not been able to find any official explanation or documentation about it.

Servers 106

Servers Cache Azure Performance 106

The Morning Paper

FEBRUARY 23, 2020

There are five different types of member in an AnyLog system, and any network node can join without restriction as any type of member. Caching of query results on the other hand, looks like a good business model, at large enough scale these might amount to pretty much the same thing). Market participants.

Blockchain 94

Blockchain Internet Internet IoT 94

Percona

JULY 5, 2023

Fragmentation is a common concern in some database systems. The principle of locality While the principle of locality is usually related to processors and cache access patterns, it also applies to data access in general. The freed space will not return to the file system but will be reused by new pages. What is fragmentation?

Open Source 131

Open Source Database Efficiency Testing 131