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. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

John McCalpin

JANUARY 9, 2019

As part of my attempt to become organized in 2019, I found several draft blog entries that had never been completed and made public. December 2013: Notes on Memory Bandwidth on the Xeon Phi (Knights Corner) Coprocessor.

Latency 40

Latency Architecture Servers Performance 40

KeyCDN

JANUARY 31, 2019

With Bucharest being the capital and largest city of Romania, it makes for a great edge server location. The next closest active POP location to Bucharest was Istanbul which was still almost 900km away; this distance adds up in terms of latency.

Internet 48

Internet Internet Ecommerce Speed 48

Smashing Magazine

APRIL 17, 2019

2019-04-17T12:30:16+02:00. 2019-04-29T18:34:58+00:00. Every time you type a URL in the browser address bar, follow a link in a page or even load a resource like an image from a different domain, the browser needs to do a DNS lookup to find the server that holds the resource we’ve requested. Drew McLellan. Preconnecting.

Performance 106

Performance Games Servers Cache 106

O'Reilly

DECEMBER 2, 2019

For applications like communication between AVs, latency–how long it takes to get a response–is more likely to be a bigger limitation than raw bandwidth, and is subject to limits imposed by physics. There are impressive estimates for latency for 5G, but reality has a tendency to be harsh on such predictions. Upcoming events.

Wireless 53

Wireless Serverless IoT Artificial Intelligence 53

Rigor

JULY 2, 2019

You can find more information about modifying this file within your server’s documentation. When setting up server-side redirection, be sure to keep the redirect URL consistent with the alternate URL specified in the page’s link rel=”alternate” tag or in the sitemap. Originally published September 2016, updated July 2019.

Mobile 60

Mobile Traffic Google Latency 60

O'Reilly

NOVEMBER 12, 2019

Rather than buying racks and racks of servers that need to handle the maximum potential traffic and be idle most of the time, it seems that serverless’ method of paying by compute is proving to be beneficial to the bottom lines of organizations. The third stand-out issue was “no server maintenance.” latency, startup, mocking, etc.)

Serverless 88

Serverless Architecture FinTech Infrastructure 88

KeyCDN

MAY 14, 2019

It’s no longer necessary to store several variations of the same image on your server. This will reduce the total number of image operations because once the image has been processed it will be cached by our shield servers, allowing our edge servers to pull and cache the processed image instead of having to process the image again.

Processing 13

Processing Cache Latency Network 13

The Netflix TechBlog

MARCH 1, 2021

It supports both high throughput services that consume hundreds of thousands of CPUs at a time, and latency-sensitive workloads where humans are waiting for the results of a computation. The subsystems all communicate with each other asynchronously via Timestone, a high-scale, low-latency priority queuing system. Warm capacity.

Serverless 228

Serverless Media Latency Social Media 228

KeyCDN

SEPTEMBER 12, 2019

Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 The main reason is because it decreases the latency to the user where they are located by serving your images from a POP physically closest to them. Another is to ensure that the settings on your server and or CDN are setup correctly.

Social Media 106

Social Media Media Google Website 106

CSS Wizardry

MARCH 3, 2019

— Harry Roberts (@csswizardry) 3 March, 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’.

Cache 264

Cache Latency Strategy Servers 264

The Morning Paper

NOVEMBER 8, 2020

The initial version of Delos went into production after eight months using a ZooKeeper-backed Loglet implementation, and then four months later it was swapped out for a new custom-built NativeLoglet that gave a 10x improvement in end-to-end latency. In Facebook’s implementation of NativeLoglet, seal simply sets a bit on a quorum of servers.

Virtualization 126

Virtualization Latency Storage Systems 126

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! In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. 30.14% in the middle of the flame graph.

Speed 126

Speed Java AWS Virtualization 126

High Scalability

DECEMBER 21, 2018

swardley: X : What's going to happen in cloud in 2019? Tim Bray : How to talk about [Serverless Latency] · To start with, don’t just say “I need 120ms.” ” And in most main­stream ap­pli­ca­tion­s, you should be able to get there with server­less. 202,157 flights tracked!

Internet 137

Internet Internet Scalability Serverless 137

CSS - Tricks

NOVEMBER 1, 2019

The FCP distribution for the 10th, 50th and 90th percentile values as reported on August 1, 2019. TTI distribution for the 10th, 50th and 90th percentile values as reported on August 1, 2019. TTFB represents the time browser waits to receive first bytes of the response from server. The average time to interactive is 9.3

Speed 46

Speed Mobile Metrics Scalability 46

Dynatrace

JANUARY 15, 2020

Having released this functionality in an Preview Release back in September 2019, we’re now happy to announce the General Availability of our Citrix monitoring extension. Citrix is a sophisticated, efficient, and highly scalable application delivery platform that is itself comprised of anywhere from hundreds to thousands of servers.

Latency 36

Latency Performance Virtualization Infrastructure 36

The Morning Paper

JANUARY 26, 2020

This week we’ll be looking at a selection of papers from the 2019 edition of the ACM Symposium of Cloud Computing ( SoCC ). Second, Reverb enables speculative bug fix analysis … Third, Reverb supports wide-area debugging for applications whose server-side components use event-driven architectures. The problem.

Programming 86

Programming Servers Network Latency 86

The Morning Paper

JULY 4, 2019

Two failure modes we focus on are a service becoming slower (increase in response latency) or a service failing outright (returning errors). Monocle grabs data from the Atlas telemetry system, the tracing system, and by querying runtime servers for configuration information such as time values.

Latency 77

Latency Engineering Metrics Traffic 77

CSS - Tricks

MARCH 16, 2020

These are: Time to first byte - Time To First Byte identifies the time at which your server sends a response. Estimated input latency - Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. numericValue and to['audits'][auditObj].numericValue

Google 82

Google Latency Website Metrics 82

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

The Netflix TechBlog

DECEMBER 17, 2019

Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low. Production usage DBLog is the foundation of the MySQL and PostgreSQL Connectors at Netflix, which are used in Delta. Beresford, and Boerge Svingen.

Database 197

Database Traffic Transportation Open Source 197

The Netflix TechBlog

DECEMBER 17, 2019

Passive instances across regions are also possible, though it is recommended to operate in the same region as the database host in order to keep the change capture latencies low. Production usage DBLog is the foundation of the MySQL and PostgreSQL Connectors at Netflix, which are used in Delta. Beresford, and Boerge Svingen.

Database 212

Database Traffic Transportation Open Source 212

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! In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. 30.14% in the middle of the flame graph.

Speed 52

Speed Java AWS Virtualization 52

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! In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. 30.14% in the middle of the flame graph.

Speed 40

Speed Java AWS Virtualization 40

Enprowess

SEPTEMBER 7, 2021

Software Developers got to use JavaScript CLI tools to create the back-end part of web applications or server-side. allows creating web application’s server-side or back-end components. is a server-side, open-source, JavaScript runtime environment that allows developers to write JavaScript on the client and the server-side.

Open Source 52

Open Source Virtualization Programming Servers 52

Alex Russell

MARCH 6, 2021

India has been the epicentre of smartphone growth in recent years, owing to the sheer size of its market and an accelerating shift away from feature phones which made up the majority of Indian mobile devices until as late as 2019. So what did $150USD fetch in 2019? The smooth, dulcet tones of 2019's Moto E6. " package.

Performance 124

Performance Network Cache Metrics 124

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

KeyCDN

JULY 11, 2019

Using an image CDN, such as KeyCDN, can significantly reduce the latency of your image delivery. Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 You can use our Brotli Test tool to see whether or not your server supports Brotli. KB and the average mobile page is 1,683.5

Speed 52

Speed Website Mobile Latency 52

The Morning Paper

SEPTEMBER 12, 2019

The Apache MADLib project is still going strong, and the recent (July 2019) 1.16 Though some of this discrepancy was due to the fact that we implemented our ideas on top of a research prototype, high-latency Java/Hadoop system, reducing that gap is an attractive target for future work.

Network 44

Network Database Programming Hardware 44

HammerDB

OCTOBER 12, 2018

Historically MySQL has been positioned for supporting web-based applications this is in contrast to enterprise based database workloads that have been served by commercial databases such as Oracle, Db2 and SQL Server. maximum transition latency: Cannot determine or is not supported. . cpupower frequency-info analyzing CPU 0: .

Best Practices 40

Best Practices Scalability Performance C++ 40

KeyCDN

JUNE 20, 2019

However, in 2019, the expectation for a good user experience is now higher than ever. 6 Ways to Optimize Your eCommerce Conversion Rate Below we’ve outlined 6 methods you should implement to increase your eCommerce conversion rate in 2019. Improve Site Speed In 2019, having fast site speed is imperative.

Ecommerce 41

Ecommerce Speed Website Mobile 41

Smashing Magazine

JANUARY 7, 2019

Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. 2019-01-07T12:00:13+00:00. 2019-04-29T18:34:58+00:00. Long FMP usually indicates JavaScript blocking the main thread, but could be related to back-end/server issues as well.

Performance 103

Performance Cache Metrics Network 103

Smashing Magazine

JANUARY 11, 2021

In the end, it’s not the load events or server response times that define the experience, but the perception of how snappy the interface feels. It used to provide an insight into how quickly the server outputs any data. This knowledge will give you the best optimization target for ongoing efforts. What does it mean?

Performance 145

Performance Cache Media Metrics 145

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? It used to provide an insight into how quickly the server outputs any data. What does it mean?

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

SEPTEMBER 29, 2021

It was released in February 2019 by the Alliance for Open Media (AOMedia). Since its release in 2019, the support for AVIF has increased considerably. Content negotiation allows the server to serve different resource formats based on what is supported by the browser. Jump to table of contents ?. AVIF Tooling And Support.

Open Source 144

Open Source Speed Website Google 144