Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Or even on a plane.

Performance 110

Performance Latency Cache Virtualization 110

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This server is spending about a third of its CPU cycles just checking the time! Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? 30.14% in the middle of the flame graph.

Speed 52

Speed Java AWS Virtualization 52

Scalegrid

JANUARY 19, 2024

This article dives straight into what triggers a rollback in MongoDB, the risks it carries, and concrete steps you can take to both prevent and recover from one. This particular write concern prioritizes data longevity over reading speed.

Database 130

Database Network Servers Monitoring 130

KeyCDN

FEBRUARY 4, 2021

This query is performed by a Domain Name Server (DNS server) or servers nearby that have been assigned responsibility for that hostname. You can think of a DNS server as a phone book for the internet. A DNS server maintains a directory of domain names and translates them to IPs. So DNS services definitely go down!

Cache 134

Cache Website Internet Internet 134

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This server is spending about a third of its CPU cycles just checking the time! Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? 30.14% in the middle of the flame graph.

Speed 40

Speed Java AWS Virtualization 40

CSS Wizardry

MARCH 3, 2019

This includes CDNs, proxy servers, and the like. Once the 60 seconds is up, the browser will head back to the server to revalidate the file. It means ‘do no t serve a copy from cache until you’ve revalidated it with the server and the server said you can use the cached copy’. public and private. Cache-Control: no-cache.

Cache 264

Cache Latency Strategy Servers 264

Tech News Gather

FEBRUARY 20, 2023

With some unique advantages like low latency and faster speed, 5G aims to give birth to a new era of mobile application development with some innovations. With the increase in speed and less latency, there are a lot of possibilities that can be explored in the field of the internet of things (IOT) and smart devices.

Mobile 40

Mobile Development Artificial Intelligence IoT 40

Scalegrid

JANUARY 12, 2024

This article analyzes cloud workloads, delving into their forms, functions, and how they influence the cost and efficiency of your cloud infrastructure. These include popular technologies such as web servers and web applications, along with advanced solutions like distributed data stores and containerized microservices.

Cloud 130

Cloud Virtualization Storage Efficiency 130

CSS - Tricks

NOVEMBER 1, 2019

TTFB represents the time browser waits to receive first bytes of the response from server. TTFB mobile speed distribution (CrUX, July 2019). FCP mobile speed distribution (CrUX, July 2019). FID mobile speed distribution (CrUX, July 2019). TTFB mobile speed distribution comparison between all web and CMS (CrUX, July 2019).

Speed 46

Speed Mobile Metrics Scalability 46

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Or even on a plane.

Performance 52

Performance Latency Cache Virtualization 52

Smashing Magazine

AUGUST 3, 2023

Largest Contentful Paint (LCP) LCP measures the perceived load speed of a webpage from a user’s perspective. Time To First Byte (TTFB) This is the time it takes for the first piece of information from the server to reach the user’s browser. The shorter the TTFB, the better the perceived speed of the site from the user’s perspective.

Performance 74

Performance Cache Traffic Metrics 74

Particular Software

SEPTEMBER 20, 2021

Sometimes developers only care about speed. Some will claim that any type of RPC communication ends up being faster (meaning it has lower latency) than any equivalent invocation using asynchronous messaging. But to be fair, we also have to process the messages on the server before we can consider the messaging case to be complete.

Benchmarking 97

Benchmarking Latency Servers Systems 97

CSS - Tricks

APRIL 1, 2021

Speed is also something Google considers when ranking your website placement on mobile. With all of this in mind, I thought improving the speed of my own version of a slow site would be a fun exercise. I’m going to audit the performance of my slow site before and after the things we tackle in this article. Lighthouse.

Cache 92

Cache Social Media Media Website 92

Smashing Magazine

MARCH 25, 2021

Of the many factors that affect page-load speed, media is a significant one. Also, if you are not using a content delivery network (CDN) or multiple CDNs to map users to the closest edge regions for reduced latencies — a practice called suboptimal routing — you might slow down the start of the video. Serve the right size.

Media 117

Media Performance Mobile Latency 117

Smashing Magazine

SEPTEMBER 28, 2022

The resource loading waterfall is a cascade of files downloaded from the network server to the client to load your website from start to finish. Client Side Rendering, Server Side Rendering And Jamstack. To run it, you have to make another API call to the server and retrieve any data you want to load. Jump to online workshops ?.

Cache 125

Cache Performance Servers Social Media 125

SQL Performance

APRIL 27, 2020

Many of the newer features we have in SQL Server were initially launched in Azure SQL Database, including (but not limited to) Always Encrypted, Dynamic Data Masking, Row Level Security, and Query Store. There is a lot of awesome technology involved with Hyperscale in how it is architected to use SSD-based caches and page servers.

Azure 55

Azure Database Serverless Hardware 55

Smashing Magazine

JANUARY 11, 2021

You need a business stakeholder buy-in, and to get it, you need to establish a case study, or a proof of concept using the Performance API on how speed benefits metrics and Key Performance Indicators ( KPIs ) they care about. Note : If you use Page Speed Insights or Page Speed Insights API (no, it isn’t deprecated!),

Performance 145

Performance Cache Media Metrics 145

Dotcom-Montior

MARCH 6, 2022

Load Time Details For Individual Elements : In the waterfall chart, when the user moves their cursor on a specific bar, he is shown a load time details which are DnsTime, ConnectTime, SSLTime, RequestTime, FirstByteTime, ResponseTime, StartTime, EndTime, Speed which is pointed in a red oval. Waiting time. If there are too many 302 redirects.

Performance 52

Performance Cache Website Speed 52

SQL Server According to Bob

JANUARY 11, 2020

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. This will help you increase system performance and avoid I/O environment errors.

Servers 40

Servers Cache Media Hardware 40

Percona

JULY 17, 2023

First, some stage-setting for this blog article. It’s a good setup for real-time analytics and high-speed logging. Redis can handle a high volume of operations per second, making it useful for running applications that require low latency. The popularity of MongoDB MongoDB has emerged as a popular database platform.

Open Source 77

Open Source Database Scalability Software 77

SQL Performance

APRIL 8, 2019

These AMD EPYC processors have a number of advantages for SQL Server workloads, as I will explain in this article. This 14nm first-generation AMD EPYC 7551 processor has 32 cores and 64 threads, and it works in one or two-socket servers. This makes it a good choice for many SQL Server workloads, especially DW workloads.

Azure 42

Azure Virtualization Storage Benchmarking 42

SQL Server According to Bob

JANUARY 11, 2020

Microsoft, ​​ Windows, ​​ Windows NT, ​​ and Windows Server ​​ are registered trademarks of Microsoft Corporation in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

Servers 40

Servers Cache Database Media 40

Percona

SEPTEMBER 1, 2023

This reduction in latency ensures that applications and websites provide a more rapid and responsive user experience. Reduced Resource Usage Optimizing resource-intensive queries and configurations can lead to a reduced burden on your server. A finely tuned database processes queries more efficiently, leading to swifter results.

Tuning 52

Tuning Database Performance Hardware 52

KeyCDN

JUNE 20, 2019

In this article we’re going to discuss various methods for improving eCommerce conversion rates. The lower conversion rate on mobile could be due to a variety of reasons including the website not being responsive for mobile devices, the speed isn’t up to par, etc. There are many ways to speed up a slow website.

Ecommerce 41

Ecommerce Speed Website Mobile 41

Smashing Magazine

JANUARY 6, 2020

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? Is it expensive JavaScript, slow web font delivery, heavy images, or sluggish rendering? Large preview ).

Performance 145

Performance Cache Network Metrics 145

Dotcom-Montior

MAY 6, 2020

Load Time Details For Individual Elements : In the waterfall chart, when the user move his cursor on a specific bar, he is shown a load time details which are DnsTime, ConnectTime, SSLTime, RequestTime, FirstByteTime, ResponseTime, StartTime, EndTime, Speed which is pointed in a red oval. The time captured by the server to produce a response.

Performance 53

Performance Cache Website Speed 53

Smashing Magazine

APRIL 17, 2019

In this article we’ll take a look at the main types of Resource Hints and when and where we can use them in our pages. One step on from DNS prefetching is preconnecting to a server. Establishing a connection to a server hosting a resource takes several steps: DNS lookup (as we’ve just discussed); TCP handshake. Preconnecting.

Performance 106

Performance Games Servers Cache 106

Smashing Magazine

JANUARY 7, 2019

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? Start Render time, Speed Index ). Rendering metrics provide an estimate of how fast content renders (e.g.

Performance 103

Performance Cache Metrics Network 103

CSS - Tricks

MARCH 16, 2020

But equally, Simon the project manager may not understand what Speed Index or First Contentful Paint means, but when he sees the Lighthouse report showing website performance score knee deep in the red, he knows you still have work to do. If your latency is higher than 50ms, users may perceive your app as laggy.

Google 82

Google Latency Website Metrics 82

Smashing Magazine

NOVEMBER 9, 2021

For instance, in SmashingMag’s Twitter account , the article’s featured image has a customized and consistent style, giving it a unique personality: Smashing Magazine’s article shared on Twitter ( Large preview ). For this article, I’ll be using its integration with WordPress and its plugin for WordPress v3.0 Let’s start!

Website 103

Website Social Media Media Design 103

KeyCDN

SEPTEMBER 12, 2019

When it comes to marketing your website, there are a lot of different aspects to consider, such as speed, SEO, conversation rates, bounce rate, and many others. Image CDN Using a content delivery network like KeyCDN, or what we also call an image CDN , can be one of the easiest and fastest ways to speed up the delivery of your images.

Social Media 106

Social Media Media Google Website 106

Brendan Gregg

AUGUST 8, 2017

For more on the equation and similar experiments, Dr. Neil Gunther has written an article on load averages: [How It Works], plus there are many Linux source block comments in [loadavg.c]. ## Linux Uninterruptible Tasks When load averages first appeared in Linux, they reflected CPU demand, as with other operating systems.

Latency 111

Latency Metrics C++ Systems 111

Alex Russell

MARCH 6, 2021

Recall that single-core performance most directly translates into speed on the web. OpenSignal's global report on connection speeds ( pdf ) suggest that WebPageTest's default 4G configuration (9Mbps w/ 170ms RTT) is a reasonable stand-in for the P75 network link. Updated Geekbench 4 single-core scores for each mobile price-point."

Performance 124

Performance Network Cache Metrics 124

Alex Russell

OCTOBER 22, 2017

Late-loading JavaScript can cause “server-side rendered” pages to fail in infuriating ways. The server sends it as a stream of bytes and when the browser encounters each of the sub-resources referenced in the document, it requests them. For a timely introduction, I recommended Kevin Schaaf’s recent talk.

Performance 68

Performance Benchmarking Network Mobile 68

Smashing Magazine

MAY 20, 2020

This article will help you with exactly that. The metrics selection is outside of the scope of this article and depends highly on the project context, but I recommend that you start by reading User-centric Performance Metrics by Philip Walton. This metric shows how much time it takes for the server to respond with something.

Performance 98

Performance Metrics Best Practices Code 98

Brendan Gregg

SEPTEMBER 5, 2017

I wrote an ftrace toolkit, [perf-tools], and the article [Ftrace: the hidden light switch]. - **perf**: since 2009, this started as a PMC profiler but can do tracing now as well, usually in a dump-and-post-process style. Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist.

Virtualization 76

Virtualization AWS Engineering Hardware 76

CSS - Tricks

MAY 3, 2021

Linux; Android 6.0.1; Moto G (4)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Mobile Safari/537.36 PTST/210419.211328", "accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",

Transportation 86

Transportation Cache Google Mobile 86