Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. 1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03

Cache 40

Cache C++ AWS Systems 40

Smashing Magazine

OCTOBER 26, 2018

2018-10-26T13:45:46+02:00. Recommended reading : WordPress Security As A Process. For that reason, we utilized two WordPress features that can help you out when serving simple JSON data out: Transients API for caching, Loading the minimum necessary WordPress using SHORTINIT constant. Denis Žoljom. 2019-04-29T18:34:58+00:00.

Cache 79

Cache Website Speed Database 79

Brendan Gregg

AUGUST 18, 2019

bpftrace uses BPF (Berkeley Packet Filter), an in-kernel execution engine that processes a virtual instruction set. pid process ID. comm Process or command name. Syscall counts by process bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count() }'. 6 * 7 * Copyright 2018 Netflix, Inc. 1 /* 2 * biolatency.bt

Latency 68

Latency C++ Cache Programming 68

Smashing Magazine

JULY 29, 2019

A 2018 study by cable.co.uk found that Zimbabwe was the most expensive country in the world for mobile data, where 1 GB cost an average of $75.20, ranging from $12.50 Meanwhile, a study of the cost of broadband in 2018 shows that a broadband connection in Niger costs $263 ‘per megabit per month’. Let’s talk about caching.

Cache 97

Cache Google Mobile Network 97

SQL Server According to Bob

FEBRUARY 5, 2018

FILE cache type was the default leading to incorrect principal errors. 54814] 1517843475.870496: Processing preauth types: 16, 15, 19, 2. 54814] 1517843478.783577: Processing preauth types: 19. 54814] 1517843475.870496: Processing preauth types: 16, 15, 19, 2. 54814] 1517843478.783577: Processing preauth types: 19.

Servers 40

Servers Code Cache Traffic 40

Smashing Magazine

JANUARY 11, 2021

Build Optimizations JavaScript modules, module/nomodule pattern, tree-shaking, code-splitting, scope-hoisting, Webpack, differential serving, web worker, WebAssembly, JavaScript bundles, React, SPA, partial hydration, import on interaction, 3rd-parties, cache. In fact, choosing the right metric is a process without obvious winners.

Performance 145

Performance Cache Media Metrics 145

The Morning Paper

JUNE 20, 2019

In total, there were 112 such incidents over the period March – September 2018 (not all of them affecting external customers). Different components of cloud services interact with each other through various types of “data”, including inter-process/node messages, persistent files, and so on. Timing incidents.

Cloud 81

Cloud Azure Cache C++ 81

Smashing Magazine

JANUARY 7, 2019

So, if we created an overview of all the things we have to keep in mind when improving performance — from the very start of the process until the final release of the website — what would that list look like? Also, as Patrick Meenan suggested, it’s worth to plan out a loading sequence and trade-offs during the design process.

Performance 104

Performance Cache Metrics Network 104

SQL Server According to Bob

DECEMBER 18, 2018

Device level flushing may have an impact on your I/O caching, read ahead or other behaviors of the storage system. FILE_FLAG_NO_BUFFERING is the Win32, CreateFile API flags and attributes setting to bypass file system cache. FILE_FLAG_NO_BUFFERING is the Win32, CreateFile API flags and attributes setting to bypass file system cache.

Servers 90

Servers Media Cache Storage 90

Randon ASCII

FEBRUARY 25, 2018

See the end of the post for an October 2018 bug fix update, or read the whole story: Flaky failures are the worst. This was starting to look like a Windows file cache bug. Maybe something to do with multi-socket coherency of the disk and cache or ??? 1) Building Chrome very quickly causes CcmExec.exe to leak process handles.

Programming 79

Programming Hardware Cache Code 79

Smashing Magazine

JANUARY 6, 2020

So, if we created an overview of all the things we have to keep in mind when improving performance — from the very start of the process until the final release of the website — what would that list look like? Also, as Patrick Meenan suggested, it’s worth to plan out a loading sequence and trade-offs during the design process.

Performance 145

Performance Cache Network Metrics 145

The Morning Paper

DECEMBER 1, 2019

Memory might be durable, but… …it is expected that caches and registers will remain volatile. One bit is used to mark a node as invalid while it is in the process of being inserted into the list, and the other bit is used as a logical deletion marker. Link-free sets.

Efficiency 60

Efficiency Cache C++ Performance 60

Rigor

SEPTEMBER 3, 2019

In one high-profile example, Amazon dealt with significant outages on Prime Day 2018 , which may have cost them as much as $99 million in sales. JCrew’s site went down on Black Friday 2018 for five hours , costing the company more than $700,000 in sales and impacting approximately 323,000 shoppers. Case studies abound.

Website 74

Website Cache Ecommerce Traffic 74

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. Advances in browser content processing. India became a 4G-centric market sometime in 2018. The Moto G4 , for example. Modern network performance and availability.

Performance 124

Performance Network Cache Metrics 124

Smashing Magazine

JANUARY 21, 2021

The build process on its own has become quite a beast over time as well, with critical CSS injects, Webpack’s code splitting, dynamic inserts of advertising and feature panels, RSS (re)generation, and eventual A/B testing on the edge. So we looked into options on automating this process as a part of the build routine. KB, Brotlified).

Performance 145

Performance Cache Mobile Network 145

Percona

AUGUST 10, 2018

Autovacuum is one of the background utility processes that starts automatically when you start PostgreSQL. As you see in the following log, the postmaster (parent PostgreSQL process) with pid 2862 has started the autovacuum launcher process with pid 2868. How many autovacuum processes can run at a time ? .

Tuning 44

Tuning Cache Database Storage 44

ACM Sigarch

MARCH 18, 2019

For example, how many buffers must a cache have to record outstanding misses if it receives 2 memory references per cycle at 2.5 Assume that your organization processes travel reimbursements and wants to know the average processing time (latency). Figure 2: (Sub-)System for Little’s Law. Forecast to Blog Post Part 2.

Systems 60

Systems Latency Performance Analytics 60

KeyCDN

SEPTEMBER 12, 2019

An easy way to compress images is with our image processing service that happens to also be fully integrated into our existing network. This is useful if you want to store optimized images instead of using a real-time image processing service. The Cache Enabler plugin then delivers WebP images based to supported browsers.

Social Media 106

Social Media Media Google Website 106

HammerDB

NOVEMBER 5, 2018

Bear in mind that writing to the log takes CPU, it will be a log writing thread or process that needs CPU time to be scheduled to be active, it also requires memory for the log buffer and finally disk for the log itself, therefore this log wait is more than just the disk component. A good example of how tuning is an iterative process.

Benchmarking 40

Benchmarking Database C++ Virtualization 40

Alex Russell

APRIL 29, 2021

After years of standards discussion and the first delivered to other platforms in 2018, iOS 14.5 April 2018 , but not usable until several releases later). Helps media apps on the web save battery when doing video processing. An extension to Service Workers that enables browsers to present users with cached content when offline.

Media 145

Media Games Education Engineering 145

SQL Performance

JULY 16, 2019

One year after a Tock release Intel would take that same microarchitecture (with some minor improvements), and use a shrink of the manufacturing process to create a Tick release. The Tick-Tock release cycle basically fell apart by about 2015 , as Intel was unable to move from a 14nm manufacturing process to a 10nm manufacturing process.

Servers 46

Servers Hardware Architecture Retail 46

Jos

JUNE 2, 2018

presented in Google IO 2018 ( source ) These tools make it easier to determine where we need to put emphasis to improve our sites. It’s better to learn the fundamentals than the library There are still lots of job descriptions and interview processes that focus on libraries and not the underlying technology. When will that be run?

Performance 237

Performance Speed Google Media 237

ACM Sigarch

MARCH 25, 2019

How long can the computer take to process (service) each packet (not counting waiting), denoted S? For the previous cache miss buffer example, the 32-buffer answer is minimal for 100-ns average miss latency. A first answer might set S = 100 ms, as that is the average time between packet arrivals. 50ms), but this is actually necessary.

Systems 53

Systems Latency Performance C++ 53

Randon ASCII

AUGUST 16, 2018

And after a lot of false starts and some hard work I figured out how Chrome, gmail, Windows, and our IT department were working together to prevent me from typing an email, and in the process I found a way to save a significant amount of memory for some web pages in Chrome. Starvation. More on this next time.

Programming 75

Programming Virtualization Code Processing 75

Smashing Magazine

JUNE 30, 2021

First and foremost, this allows you to implement arbitrarily complex caching behavior, but it has also been extended to let you tap into long-running background fetches, push notifications, and other functionality that requires code to run without an associated page. The DOM actor now updates the DOM according to the new state object.

Games 145

Games Architecture Code C++ 145

Smashing Magazine

JANUARY 15, 2019

The Mozilla Internet Health Report 2018 states that — especially as the Internet expands into new territory — “sustainability should be a bigger priority.” 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.

Website Performance 74

Website Performance Website Energy Performance 74

Alex Russell

OCTOBER 22, 2017

Answering it requires an understanding of how browsers process resources (which differs by type) and the concept of the critical path. This input processing happens on document’s main thread , where JavaScript runs. Processing input (including scrolling w/ active touch listeners). ” A good question!

Performance 68

Performance Benchmarking Network Mobile 68

High Scalability

JULY 20, 2018

That means multiple data indirections mean multiple cache misses. jaybo_nomad : The Allen Institute for Brain Science is in the process of imaging 1 cubic mm of mouse visual cortex using TEM at a resolution of 4nm per pixel. They are very expensive. This is where your performance goes. Some say MRAM will never work in automotive.

Internet 121

Internet Internet Scalability Automotive 121

Jos

JUNE 2, 2018

presented in Google IO 2018 ( source ). It’s better to learn the fundamentals than the library There are still lots of job descriptions and interview processes that focus on libraries and not the underlying technology. How would you architecture a non-trivial size web project (client, server, databases, caching layer)?

Performance 130

Performance Speed Google Media 130

Enprowess

MARCH 10, 2022

As a result of this, the additional bindings you have got, the other watchers are created, and the cumbersome process becomes. As a part of the development process, Reactjs executes test suites continuously to run the test cases. However, as per the StackOverflow Developer Survey of 2018, more developers work with Angular than React.

Development 52

Development Google Open Source Servers 52

Smashing Magazine

NOVEMBER 22, 2021

Now, let’s take a deeper look into the actions and processes we put in place in order to achieve these significant results. So once a certain level of performance is achieved, we want to be able to preserve it without being constantly required to invest additional effort, or slow down the development process. The Wix Challenge.

Website 128

Website Performance Google Media 128

Abhishek Tiwari

DECEMBER 27, 2017

There are several emerging data trends that will define the future of ETL in 2018. In 2018, we anticipate that ETL will either lose relevance or the ETL process will disintegrate and be consumed by new data architectures. In contrast, Alluxio a middleware for data access - think Alluxio storage layer as fast cache.

Big Data 49

Big Data Artificial Intelligence Storage Hardware 49

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 166

Cache Design Testing Development 166

The Netflix TechBlog

DECEMBER 17, 2019

Nonetheless, we found a number of limitations that could not satisfy our requirements e.g. stalling the processing of log events until a dump is complete, missing ability to trigger dumps on demand, or implementations that block write traffic by using table locks. Some of DBLog’s features are: Processes captured log events in-order.

Database 212

Database Traffic Transportation Open Source 212

The Netflix TechBlog

DECEMBER 17, 2019

Nonetheless, we found a number of limitations that could not satisfy our requirements e.g. stalling the processing of log events until a dump is complete, missing ability to trigger dumps on demand, or implementations that block write traffic by using table locks. Some of DBLog’s features are: Processes captured log events in-order.

Database 197

Database Traffic Transportation Open Source 197

Smashing Magazine

SEPTEMBER 6, 2021

This approach was touted to be better for fine-grained caching because each subresource could be cached individually and the full bundle didn’t need to be redownloaded if one of them changed. This retry process best happens, of course, somewhere before the back-end server — for example, at the load balancer.

Network 107

Network Servers Cache Traffic 107

Smashing Magazine

NOVEMBER 12, 2021

They were introduced at the React Conf 2018 to address three major problems of class components: wrapper hell, huge components, and confusing classes. The clean-up process typically follows the form below. This is an asynchronous process, and so we used the async/await function, we could have also used the dot then the syntax.

Code 119

Code Availability Efficiency Performance 119