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. Logs are important because you’ll naturally want an event-based record of any notable anomalies across the system. Watch webinar now!

Open Source 212

Open Source Metrics Cloud Transportation 212

Brendan Gregg

FEBRUARY 28, 2023

This talk originated from my updates to Systems Performance 2nd Edition , and this was the first time I've given this talk in person! CXL in a way allows a custom memory controller to be added to a system, to increase memory capacity, bandwidth, and overall performance. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

Smashing Magazine

MAY 25, 2021

If you want to use web fonts your choices are basically Flash of Invisible Text (aka FOIT) where the text is hidden until the font downloads or Flash of Unstyled Text (FOUT) where you use the fallback system font initially and then upgrade it to the web font when it downloads. Wasn’t font-display Supposed To Solve This?

Operating System 144

Operating System Google Website Cache 144

Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 avg-cpu: %user %nice %system %iowait %steal %idle 14.81 avg-cpu: %user %nice %system %iowait %steal %idle 14.86 avg-cpu: %user %nice %system %iowait %steal %idle 14.95 avg-cpu: %user %nice %system %iowait %steal %idle 14.54

Cache 40

Cache C++ AWS Systems 40

Brendan Gregg

APRIL 14, 2022

offer letter logo (2014) flame graphs (2014) eBPF tools (2014-2019) PMC analysis (2017) my pandemic-abandoned desk (2020); office wall I joined Netflix in 2014, a company at the forefront of cloud computing with an attractive work culture. A large and unexpected opportunity has come my way outside of Netflix that I've decided to try.

Java 52

Java Cache Cloud AWS 52

ACM Sigarch

NOVEMBER 4, 2019

In particular, she highlighted her transformative MIT’78 VLSI System Design Course she designed and taught as a Visiting Professor of EECS at MIT. Goodman, and “Speculative Cache Ways: On-Demand Cache Resource Allocation” published at MICRO 1999 by David H.

Hardware 18

Hardware Architecture Programming Innovation 18

Scalegrid

OCTOBER 2, 2019

October 2, 2019 – ScaleGrid, a rapidly growing leader in the Database-as-a-Service (DBaaS) space, has just launched their new fully managed Redis on Azure service. The demand for Redis is skyrocketing across dozens of use cases, particularly for cache, queues, geospatial data, and high speed transactions. PALO ALTO, Calif.,

Azure 37

Azure Cloud Open Source Virtualization 37

KeyCDN

SEPTEMBER 12, 2019

This can be a problem in a lot of content management systems such as WordPress or Magento, because theme developers tend to scale images down in responsive themes using CSS. Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 It is usually recommended that you upload images at scale.

Social Media 106

Social Media Media Google Website 106

The Netflix TechBlog

OCTOBER 18, 2019

theme of the ML Platform meetup hosted at Netflix, Los Gatos on Sep 12, 2019. These signals include member activity data (login, search, playback), intent-to-treat (what title/assets the system wants to impress to the member) and the treatment (impressions of images, trailers) that actually made it to the member’s device.

Infrastructure 126

Infrastructure Metrics Architecture Efficiency 126

Smashing Magazine

JANUARY 15, 2019

2019-01-15T13:30:32+01:00. 2019-04-29T18:34:58+00:00. For the more adventurous/technical, the top (table of processes) command provides similar metrics on most Unix-like operating systems such as macOS and Ubuntu. A particular favorite in the WordPress space is WP Super Cache. Jack Lenox.

Website Performance 74

Website Performance Website Energy Performance 74

Adrian Cockcroft

MARCH 21, 2020

In a small system this may be a table in a central relational database, but it’s best setup as a NoSQL data source using something like Amazon DynamoDB or Apache Cassandra, with a caching client library or at large scale a microservice data access layer. For reference Netflix added almost 100,000 new users per day in Q4 2019).

Testing 52

Testing Tuning Database Cache 52

High Scalability

OCTOBER 3, 2019

The demand for Redis is skyrocketing across dozens of use cases, particularly for cache, queues, geospatial data, and high speed transactions.

Azure 23

Azure Cloud Open Source Cache 23

The Netflix TechBlog

OCTOBER 18, 2019

theme of the ML Platform meetup hosted at Netflix, Los Gatos on Sep 12, 2019. These signals include member activity data (login, search, playback), intent-to-treat (what title/assets the system wants to impress to the member) and the treatment (impressions of images, trailers) that actually made it to the member’s device.

Infrastructure 100

Infrastructure Metrics Architecture Efficiency 100

Smashing Magazine

JUNE 30, 2021

iOS empowers developers to easily parallelize code using Grand Central Dispatch , Android does this via their new, unified task scheduler WorkManager and game engines like Unity have job systems. On design systems, CSS/JS and UX. The Main Thread Is Overworked And Underpaid ,” Surma, Chrome Dev Summit 2019 (Video). Web Workers.

Games 145

Games Architecture Code C++ 145

The Morning Paper

APRIL 11, 2019

UPDATE 2019-04-14: An author update has been published for this paper which details that with current browser versions, ServiceWorkers can only stay alive for about a minute after the user navigates away from the site. Master of web puppets: abusing web browsers for persistent and stealthy computation Papadopoulus et al., NDSS’19.

Website 44

Website Network Traffic Cache 44

SQL Server According to Bob

DECEMBER 18, 2018

Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently. For example, if a flight booking reports that a seat has successfully been booked, then the seat will remain booked even if the system crashes.” – [link]. The Back Story.

Servers 90

Servers Media Cache Storage 90

The Morning Paper

SEPTEMBER 19, 2019

We’ve been covering papers from VLDB 2019 for the last three weeks, and next week it will be time to mix things up again. I really do want to cover this one at some point, along with Implementation of cluster-wide logical clock and causal consistency in MongoDB from SIGMOD 2019. for machine generated emails sent to humans). Yes please!

Blockchain 46

Blockchain Hardware Google Analytics 46

HammerDB

JUNE 27, 2022

HammerDB has graphical and command line interfaces for the Windows and Linux operating systems. An important concept was to simulate database users called Virtual Users in parallel (rather than concurrently) to accurately simulate a real database workload with multiple users running from separate systems. Cached vs Scaled Workloads.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

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. Table-valued functions use a table variable, which can be used to cache and replay results in suitable circumstances. Spools are the least costly way to cache partial results.

Servers 106

Servers Cache Azure Performance 106

Smashing Magazine

JUNE 20, 2019

2019-06-20T11:00:16+02:00. 2019-06-20T10:35:07+00:00. Without Google Fonts you would be limited to the handful of “ system fonts ” installed on your user’s device. System fonts or ‘Web Safe Fonts’ are the fonts most commonly pre-installed across operating systems. Browser Caching. Danny Cooper.

Google 111

Google Performance Cache Website 111

Rigor

SEPTEMBER 3, 2019

(They seem to have learned from their mistakes for Prime Day 2019.). And Nordstrom dealt with crashes and other issues at the beginning of its popular anniversary sale in 2019. Prior to any peak event, take the time to review your CDN’s cache design and offload metrics to determine what improvements can be made.

Website 74

Website Cache Ecommerce Traffic 74

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 197

Database Traffic Transportation Open Source 197

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 212

Database Traffic Transportation Open Source 212

SQL Performance

MARCH 30, 2021

) ; My test environment is SQL Server 2019 CU9 on a laptop with 8 cores and 16GB of memory allocated to the instance. A parallel query might start out requesting DOP 8, but be progressively downgraded to DOP 4, DOP 2, and finally DOP 1 due to a lack of system resources at that moment. It can be downloaded at the same link.

Cache 98

Cache Servers Operating System Processing 98

SQL Server According to Bob

MAY 19, 2019

Partitioning allows SQL Server to scale to the largest systems with record-setting performance. When promoted to a super-latch on a 64 CPU system the memory requirement becomes 32 + (32 *64) = 2080 bytes. However, on smaller systems and VMs the partitioning may not be required to maintain performance. IO Request Caches.

IoT 61

IoT Servers Development Cache 61

Smashing Magazine

OCTOBER 26, 2018

2019-04-29T18:34:58+00:00. WordPress core developers used a system of hooks which allowed other developers to modify or extend certain functionalities. Headless WordPress: The Ups And Downs Of Creating A Decoupled WordPress. Headless WordPress: The Ups And Downs Of Creating A Decoupled WordPress. Denis Žoljom. post_slug || !

Cache 79

Cache Website Speed Database 79

Smashing Magazine

OCTOBER 29, 2019

2019-10-29T12:30:59+02:00. 2019-10-29T13:36:09+00:00. Animated images, otherwise served in GIF format, also benefit from WebP compression systems. Image editing software and content management systems are, too. Content management systems are in a similar spot. What Is WebP Caching? Suzanne Scacca.

Website 72

Website Speed Cache Google 72

Rigor

NOVEMBER 7, 2019

Reading time 4 min The CPDoS attack that was discovered in October 2019 and the corresponding attention paid to it within the technology sphere brought to light an issue many of us overlook: the boundaries of our web applications have expanded, and that has increased the number of systems and services that must be monitored and secured.

Monitoring 40

Monitoring Performance Cache Ecommerce 40

The Morning Paper

DECEMBER 10, 2019

HotStorage 2019. The global object space contains all objects (potentially across multiple systems), allowing persistent pointers to refer to data with long lifetimes and giving software the ability to operate directly on persistent structures. A tale of two abstractions: the case for object space , Bittman et al.,

Hardware 52

Hardware Virtualization Operating System Programming 52

Alex Russell

MARCH 6, 2021

A then-representative $200USD device had 4-8 slow (in-order, low-cache) cores, ~2GiB of RAM, and relatively slow MLC NAND flash storage. The worldwide ASP 18 months ago was ~$300USD , so the average performance in the deployed fleet can be represented by a $300 device from mid-2019. So what did $150USD fetch in 2019?

Performance 124

Performance Network Cache Metrics 124

CSS - Tricks

JUNE 19, 2019

— Addy Osmani (@addyosmani) May 31, 2019. Browsers do caching, silly. Bulma styles are sharp, and the layout system is easy to learn. — Burke Holland (@burkeholland) May 28, 2019. — Jeremy Thomas (@jgthms) May 28, 2019. Walmart Grocery did this for their site. 69% smaller JS bundles. Is that a ?

Cache 63

Cache Internet Internet Code 63

Smashing Magazine

APRIL 9, 2019

2019-04-09T12:30:59+02:00. 2019-04-29T18:34:58+00:00. They’d take the hit for the first site to use the file, but then it would sit in their local browser cache and downloads could be skipped for each subsequent site. Understanding Subresource Integrity. Understanding Subresource Integrity. Drew McLellan.

Website 59

Website Servers Code Best Practices 59

Smashing Magazine

JUNE 26, 2019

2019-06-26T14:00:59+02:00. 2019-06-26T14:06:48+00:00. Let the web developer handle all of the necessary speed optimizations like caching and file minification while you take on the following design tips and strategies: 1. What Web Designers Can Do To Speed Up Mobile Websites. Suzanne Scacca. Clean coding practices. Minification.

Website 110

Website Speed Mobile Design 110

Enprowess

SEPTEMBER 7, 2021

Real-time software system – Collaboration tools used for video/audio conferencing, document writing, Chat applications, etc. It helps isolated bugs quickly and reduces system downtime. Easy maintenance: This library re- utilizes system components and resolves any issues regarding React updates. Use cases of Node.js

Open Source 52

Open Source Virtualization Programming Servers 52

SQL Performance

JULY 16, 2019

Now, I am advising people to strongly consider AMD for SQL Server workloads as the AMD EPYC "Rome" processors are released in Q3 of 2019. They will also have up to 256MB of L3 cache per processor. So, what has changed my mind? The Death of Tick-Tock. Figure 2: AMD EPYC Rome Processor. There are many reasons!

Servers 46

Servers Hardware Architecture Retail 46

SQL Performance

APRIL 8, 2019

The L3 cache size is 64MB. The L3 cache size is 64MB. On March 25, 2019, Microsoft announced the availability of higher performance, larger capacity managed disks for Azure VMs. This 14nm first-generation AMD EPYC 7551 processor has 32 cores and 64 threads, and it works in one or two-socket servers. lanes for I/O connectivity.

Azure 42

Azure Virtualization Storage Benchmarking 42

The Morning Paper

SEPTEMBER 12, 2019

The Apache MADLib project is still going strong, and the recent (July 2019) 1.16 SQL provides a declarative programming interface, below which the system itself can figure out the most effective execution plans based on data size and statistics, layout, compute hardware etc. VLDB’19. Why would anyone want to do that???

Network 44

Network Database Programming Hardware 44