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

KeyCDN

MAY 14, 2019

We’re thrilled to announce that we’ve added the Image Processing feature! How Does Image Processing Work? The Image Processing feature is available on all Pull Zones. Enabling the Origin Shield setting is required because all image processing will occur at our shield locations. For example, the query string ?

Processing 13

Processing Cache Network Latency 13

High Scalability

MARCH 1, 2019

It was made possible by using a low latency of 0.1 seconds, the lower the latency, the more responsive the robot. Euros have to internationalize IN ORDER TO scale, and most die in the process. They'll learn a lot and love you forever. AWSonAir : @McDonalds uses Amazon ECS to scale to support 20,000 orders per second.

Internet 33

Internet Internet Scalability Blockchain 33

Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. This is a rough post to share this old but good case study of using these tools, and to help justify their further development.

Cache 78

Cache C++ AWS Java 78

All Things Distributed

SEPTEMBER 25, 2017

The Region will be in the heart of Gulf Cooperation Council (GCC) countries, and we're aiming to have it ready by early 2019. This Region will consist of three Availability Zones at launch, and it will provide even lower latency to users across the Middle East. This news marks the 22nd AWS Region we have announced globally.

Cloud 145

Cloud Education Energy Government 145

Smashing Magazine

APRIL 17, 2019

2019-04-17T12:30:16+02:00. 2019-04-29T18:34:58+00:00. A DNS lookup is the process of turning a human-friendly domain name like example.com into the machine-friendly IP address like 123.54.92.4 Optimizing Performance With Resource Hints. Optimizing Performance With Resource Hints. Drew McLellan. DNS Prefetching.

Performance 107

Performance Servers Games Cache 107

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.

Serverless 235

Serverless Media Latency Social Media 235

Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. processing parts of the file, instead of making multiple passes over the entire file). ## 7. Mostly screenshots. ## 1.

Cache 40

Cache C++ AWS Systems 40

Scalegrid

NOVEMBER 25, 2019

ScyllaDB offers significantly lower latency which allows you to process a high volume of data with minimal delay. percentile latency is up to 11X better than Cassandra on AWS EC2 bare metal. This number is more inline with our recent 2019 Open Source Database Trends Report where 56.9% different database types.

Big Data 187

Big Data Database Open Source Azure 187

O'Reilly

NOVEMBER 12, 2019

latency, startup, mocking, etc.) The results in Figure 12 reflect what we know of the cloud market and mirror what we found in our cloud native survey from earlier in 2019. Custom tooling could simply be a shell script or cron job that is unique to a build process, but starts a chain of existing tools provided by various vendors.

Serverless 87

Serverless Architecture FinTech Infrastructure 87

The Netflix TechBlog

MAY 14, 2021

We are expected to process 1,000 watermarks for a single distribution in a minute, with non-linear latency growth as the number of watermarks increases. The goal is to process these documents as fast as possible and reliably deliver them to recipients while offering strong observability to both our users and internal teams.

Traffic 166

Traffic Java Latency Google 166

KeyCDN

SEPTEMBER 12, 2019

Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 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.

Social Media 106

Social Media Media Google Website 106

Tasktop

JUNE 18, 2019

In one week’s time, thousands of IT and business professionals will descend on London for the latest iteration of DevOps Enterprise Summit London 2019 (June 25-27 – InterContinental O2, London, UK). Here are four tips to get the most out of DOES London 2019: Tip #1 – Develop a plan of attack. The countdown is on.

DevOps 74

DevOps Network Software Software 74

The Netflix TechBlog

NOVEMBER 2, 2020

Finding the best place to throttle traffic Zuul can apply load shedding in two moments during the request lifecycle: when it routes requests to a specific back-end service (service throttling) or at the time of initial request processing, which affects all back-end services (global throttling).

Traffic 261

Traffic Metrics Infrastructure Architecture 261

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 221

Database Traffic Transportation Open Source 221

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 207

Database Traffic Transportation Open Source 207

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. What about short-lived processes, like a service restarting in a loop? In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. top(1) showed that only the Cassandra database was consuming CPU.

Speed 103

Speed Java AWS Virtualization 103

CSS Wizardry

MARCH 3, 2019

— Harry Roberts (@csswizardry) 3 March, 2019. If, however, there wasn’t a new file on the server, we’ll bring back a 304 header, no new file, but an entire roundtrip of latency. We can completely cut out the overhead of a roundtrip of latency. On high latency connections, this saving could be tangible.

Cache 264

Cache Latency Strategy Servers 264

The Morning Paper

NOVEMBER 8, 2020

That’s not just theoretical, Facebook actually did this in production while Delos was processing over 1.8 For Facebook’s Delos, reconfiguration latencies of 10s of ms are ok. The overheads of virtualisation are pleasingly low: about 100-150µs at p99 latency, 10s of ms for reconfiguration, and no impact on peak throughput.

Virtualization 126

Virtualization Latency Storage Systems 126

Dynatrace

JUNE 25, 2021

Already in the 2000s, service-oriented architectures (SOA) became popular, and operations teams discovered the need to understand how transactions traverse through all tiers and how these tiers contributed to the execution time and latency. In 2019, the OpenCensus and OpenTracing projects merged into what we now know as OpenTelemetry.

Open Source 215

Open Source Monitoring Google Systems 215

CSS - Tricks

MARCH 16, 2020

This allows us to process the report later without resulting in a messy pyramid of JavaScript. 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. then(results => { return chrome.kill().then(()

Google 82

Google Latency Website Metrics 82

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). The criticality score is combined with a safety score and experiment weight (failure experiments, then latency, than failure inducing latency) to produce the final prioritization score.

Latency 77

Latency Engineering Metrics Traffic 77

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. All processes on these hosts are recognized, and Citrix processes are grouped together in order to characterize the combined Citrix overhead on the infrastructure.

Latency 39

Latency Performance Virtualization Infrastructure 39

Alex Russell

DECEMBER 18, 2022

Without beating around the bush, our ASP 2019 device was an Android that cost between $300-$350, new and unlocked. These devices feature: Eight slow, big.LITTLE ARM cores (A75+A55, or A73+A53) built on last-generation processes with very little cache. 4GiB of RAM. Qualcomm has some 'splainin to do.

Performance 120

Performance Mobile Network Latency 120

The Morning Paper

JUNE 30, 2019

Today we’re jumping from HotOS topics of 2019, to hot topics of 1977! In such a situation I’d expect to see unusually high latencies, but normal throughput). Processes (or in the case of System R, transactions) can also bump into each other when contending for shared resources. The convoy phenomenon Blasgen et al.,

Traffic 75

Traffic Latency Programming Scalability 75

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. What about short-lived processes, like a service restarting in a loop? In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. top(1) showed that only the Cassandra database was consuming CPU.

Speed 52

Speed Java AWS Virtualization 52

Alex Russell

MARCH 6, 2021

Advances in browser content processing. 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? " package.

Performance 127

Performance Network Cache Metrics 127

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. What about short-lived processes, like a service restarting in a loop? In 2019 myself and others tested kvm-clock and found it was only about 20% slower than tsc. top(1) showed that only the Cassandra database was consuming CPU.

Speed 40

Speed Java AWS Virtualization 40

The Morning Paper

DECEMBER 10, 2019

HotStorage 2019. Applications running on BNVM (byte-addressable non-volatile memory) must have a way to create pointers that outlast a process’s virtual address space and are valid in other address spaces. At 0.4ns, we’re in the same ballpark as regular L1 cache reference latency. The last word.

Hardware 52

Hardware Virtualization Operating System Programming 52

HammerDB

OCTOBER 18, 2019

rc3-custom #1 SMP Mon Aug 12 14:07:33 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Welcome to Ubuntu 19.04 (GNU/Linux 5.3.0-rc3-custom Benchmark on a Parallel Processing Monster! So lets take an Ubuntu system with Platinum 8280 CPUs with the following Ubuntu OS, reboot and check the CPU configuration before running any tests.

Benchmarking 63

Benchmarking Performance Hardware C++ 63

Enprowess

SEPTEMBER 7, 2021

with its low latency I/O operations, gives the benefit of ‘No buffering’ to developers. 12.9.0 – August 20, 2019; 16.8.6 – May 6, 2019. Reactjs makes API calls and processes in-browser data. Scalability: Applications developed with Node.js can be scaled vertically and horizontally to improve their performance.

Open Source 52

Open Source Virtualization Programming Servers 52

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 Image Processing Service We offer an image processing service that is fully integrated into our existing network.

Speed 52

Speed Website Mobile Latency 52

John McCalpin

JULY 23, 2018

Updates on 2019-01-23 in blue. When running a single user thread, you will often get the advertised single-core Turbo frequency, but if the operating system enables more cores to handle (even very short-lived) background processes, your frequency may drop unexpectedly. RDTSCP can still be executed later than expected, but not earlier.

Code 45

Code Programming Latency Testing 45

HammerDB

OCTOBER 12, 2018

maximum transition latency: Cannot determine or is not supported. . Note that the following section applies in particular to pre-2019 versions of MySQL and MariaDB and more recent versions of MySQL 8 have already been updated for optimal performance on multiple platforms and therefore the change is this section is not required).

Best Practices 40

Best Practices Scalability Performance C++ 40

Testsigma

FEBRUARY 12, 2021

The implementation of emerging technologies has helped improve the process of software development, testing, design and deployment. With all of these processes in place, cost optimization is also a high concern for organizations worldwide. Are you aware that the scale of the app testing industry in 2019 was over USD$ 40 billion?

Artificial Intelligence 92

Artificial Intelligence Software Software IoT 92

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. 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

Smashing Magazine

SEPTEMBER 29, 2021

Complex compression algorithms may require higher processing power to encode/decode images. A complex decoding process can slow down the rendering of images. 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.

Open Source 145

Open Source Speed Website Google 145