Brendan Gregg

JULY 2, 2021

E.g., to see process execution with timestamps using execsnoop(8): # execsnoop-bpfcc -T. Low frequency events such as process execution should be negligible to capture. execsnoop New processes (via exec(2)) table. BPF didn't exist on those versions, so I used basic Ftrace capabilities that were available on Linux 3.2.

Latency 145

Latency Cache Energy Systems 145

Dynatrace

FEBRUARY 25, 2021

Since its introduction by AWS in 2014, AWS Lambda has revolutionized the compute space and boosted the entire serverless movement. To handle N parallel requests, N Lambda instances need to be available, and AWS will spin up up to 1000 such instances automatically to handle 1000 parallel requests. Dynatrace news.

Lambda 208

Lambda AWS Monitoring Serverless 208

Dynatrace

MAY 31, 2021

Since Kubernetes emerged in 2014, it has become a popular solution for scaling, managing, and automating the deployments of containerized applications in distributed environments. DevOps and continuous delivery: A revolution in processes, and the way people and software delivery teams work. Resource optimization.

Virtualization 132

Virtualization DevOps Infrastructure Cloud 132

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. What about short-lived processes, like a service restarting in a loop? How long does it take to read the time?

Speed 126

Speed Java AWS Virtualization 126

The Morning Paper

FEBRUARY 11, 2020

Let’s Encrypt was publically announced on November 18th 2014, and began providing service to the public on Decemmber 3rd 2015. In late 2014, it secured financial commitments from Akamai, Cisco, EFF, and Mozilla, allowing the organization to purchase equipment, secure hosting contracts, and pay initial staff.

Internet 119

Internet Internet Open Source Transportation 119

Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. C Process Name = java Kbytes : count distribution 0 -> 1 : 0 | | 2 -> 3 : 0 | | 4 -> 7 : 0 | | 8 -> 15 : 31 | | 16 -> 31 : 15 | | 32 -> 63 : 15 | | 64 -> 127 : 15 | | 128 -> 255 : 1682 | *|. Hit Ctrl-C to end. ^C

Cache 105

Cache C++ AWS Latency 105

The Netflix TechBlog

APRIL 17, 2019

Netflix headquarters circa 2014. The standard specification describes in minute detail how a video bitstream should be processed in order to produce displayable video frames. AOM has produced the reference software for AV1, which is called libaom and is available online. It’s a nice building with good architecture!

Open Source 166

Open Source Scalability Speed Efficiency 166

Brendan Gregg

DECEMBER 31, 2017

My last talk for 2017 was at AWS re:Invent, on "How Netflix Tunes EC2 Instances for Performance," an updated version of my [2014] talk. Not a lot has changed with these tunables since my [2014] talk. Casey Rosenthal (traffic and chaos) Models of Availability. Networking. tcp_wmem = 4096 12582912 16777216 net.ipv4.tcp_rmem

Tuning 61

Tuning AWS Best Practices Network 61

Brendan Gregg

DECEMBER 30, 2017

My last talk for 2017 was at AWS re:Invent, on "How Netflix Tunes EC2 Instances for Performance," an updated version of my [2014] talk. Not a lot has changed with these tunables since my [2014] talk. Casey Rosenthal (traffic and chaos) Models of Availability. Networking. tcp_wmem = 4096 12582912 16777216 net.ipv4.tcp_rmem

Tuning 52

Tuning AWS Best Practices Network 52

CSS Wizardry

MARCH 3, 2019

If there is a newer file available on the server, we definitely want to download it. We’ve talked a lot so far about revalidation: the process of the browser making the trip back to the server to check whether a fresher file might be available. Stale-While-Revalidate, Stale-If-Error Available Today. Steve Souders , 2014.

Cache 264

Cache Latency Strategy Servers 264

Alex Podelko

NOVEMBER 21, 2018

In 2014, I was preparing a presentation about load testing tools and criteria for their selection. It is great that the book is not limited by the core JMeter functionality and discusses available components and integrations when appropriate. Load testing is an important part of the performance engineering process.

DevOps 113

DevOps Testing Testing Tools Performance Testing 113

The Morning Paper

JANUARY 21, 2020

In the next post we’ll look at the detailed analysis of how a team at Etsy handled a particular incident on December 4th 2014, to see what we can learn from it. activities escalate following an unexpected event in a monitored process. function distributions of cognitive processes during anomaly response. Patterson et al.

Internet 98

Internet Internet Strategy Energy 98

ACM Sigarch

APRIL 26, 2018

APU: Accelerated Processing Unit is the AMD’s Fusion architecture that integrates both CPU and GPU on the same die. BPU: Brain Processing Unit is the design of the AI chips by Horizon Robotics. They unveiled their first two embedded AI chips fabricated with TSMC 40nm process in December 2017: “Journey 1.0

Hardware 99

Hardware Artificial Intelligence Architecture Google 99

Brendan Gregg

NOVEMBER 29, 2017

At Netflix, we've been using these technologies as they've been made available for instance types in the AWS EC2 cloud. AWS EC2 uses a different image type and boot process for PV and HVM, as described on the [Linux AMI Virtualization Types] page. It's all a bit confusing, and I wrote about this in 2014: [Xen Modes].

Virtualization 111

Virtualization AWS Hardware Storage 111

The Morning Paper

OCTOBER 1, 2020

That app is subject to “voluminous (public) user feedback”, and in the 2014 floating-point based calculator, bug reports relating to inaccurate results, unnecessary zeroes, and the like. Available in open source , the resulting library is packaged in the Android Calculator app, with over 500 million installations.

Java 143

Java Hardware Open Source Testing 143

Scalegrid

JULY 17, 2020

2014) added support for JSONB data type. JSON is faster to ingest vs. JSONB – however, if you do any further processing, JSONB will be faster. When the data is fetched, the reverse process “deTOASTting” needs to happen. For example, find all books that are available in braille. JSON database in 9.2

Storage 321

Storage Database Efficiency Processing 321

Alex Russell

APRIL 29, 2021

This post mines publicly available data on the pace of compatibility fixes and feature additions to assess the claim. The information it captures is, however, available going back somewhat further, providing a fuller picture of the trend lines of engine completeness. Count of APIs available from JavaScript by Web Confluence.

Media 145

Media Games Education Engineering 145

SQL Performance

FEBRUARY 22, 2021

We pay a lot of attention to latency here, along with any long-running transactions, because of downstream impact to technologies that use the log reader – like Availability Groups and transactional replication. Recently one of our teams was investigating a log reader latency issue. sysprocesses.

Latency 57

Latency Servers Monitoring Systems 57

O'Reilly

APRIL 23, 2024

As the internet grew, the amount of information available to consumers became so vast that it outran traditional human means of curation and selection. But in 2013 and 2014, it remained stuck at 83% , and while in the ten years since, it has reached 95% , it had become clear that the easy money that came from acquiring more users was ending.

Social Media 111

Social Media Google Internet Internet 111

Alex Russell

JUNE 22, 2022

There's no point in recommending a better browser because none is available. The New York Times reported in late 2020 that Google now pays Apple between $8-12 billion per year , up from $1 billion in 2014. In 2014, Apple would have enjoyed a profit margin of 50% if it had spent half a billion on browser engineering. Cui bono? —

Engineering 110

Engineering Traffic Government Google 110

Brendan Gregg

JULY 2, 2021

While basic, I've solved many perf issues with this tool alone, including for misconfigured systems where a shell script is launching failing processes in a loop, and when some minor application is crashing and is restarting every few minutes but has not yet been noticed. ## 2. execsnoop New processes (via exec(2)) table 2. acpid [.]

Open Source 40

Open Source Latency Cache Energy 40

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. What about short-lived processes, like a service restarting in a loop? How long does it take to read the time?

Speed 40

Speed Java AWS Virtualization 40

The Morning Paper

JANUARY 23, 2020

Today we’ll be digging into the analysis of an incident that took place at Etsy on December 4th, 2014. The shop had been closed so no data was available. The process tracing exercise included: Examning IRC transcripts from multiple channels. The blog post was subsequently unpublished.

Internet 53

Internet Internet Cache Engineering 53

VoltDB

JANUARY 12, 2018

Our co-founder, 2014 Turing Award winner, Mike Stonebraker , has a saying: “ Eventual consistency means ‘creates garbage.’” ” One of the suggested benefits of eventual consistency systems is that they support high availability across multiple data centers.But the biggest downside ? No More Eventual Consistency.

Database 40

Database Blockchain Healthcare Transportation 40

VoltDB

JANUARY 12, 2018

Our co-founder, 2014 Turing Award winner, Mike Stonebraker , has a saying: “ Eventual consistency means ‘creates garbage.’” ” One of the suggested benefits of eventual consistency systems is that they support high availability across multiple data centers.But the biggest downside ? No More Eventual Consistency.

Database 40

Database Blockchain Healthcare Transportation 40

Percona

JUNE 4, 2023

Introduction: MariaDB vs. MySQL The goal of this blog post is to evaluate, at a higher level, MariaDB vs. MySQL vs. Percona Server for MySQL side-by-side to better inform the decision making process. Efficient data processing and indexing, making it optimal for executing queries and handling large datasets.

Open Source 52

Open Source Servers Storage Scalability 52

KeyCDN

OCTOBER 17, 2018

PostCSS was developed by Andrey Sitnik , also the author of Autoprefixer, as a means to use JavaScript (mainly with plugins) for CSS processing and or transforming styles. You can still use your favorite preprocessor and then use PostCSS processing with plugins (although this might complicate your workflow rather than simplify it).

Google 72

Google Processing Code Development 72

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. What about short-lived processes, like a service restarting in a loop? How long does it take to read the time?

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. processing parts of the file, instead of making multiple passes over the entire file). ## 7. No editing, spell checking, or comments. Mostly screenshots. ## 1. Hit Ctrl-C to end. ^C Nothing odd here. ## 5.

Cache 40

Cache C++ AWS Systems 40

Enprowess

JANUARY 11, 2022

With a myriad of options available out there, we have compiled a list of top frontend frameworks out there to help you out. Many front end frameworks are available in different languages. Of all the available technologies, JavaScript popularity has shot up exponentially. Let’s begin!!

Virtualization 64

Virtualization Website Speed Mobile 64

SQL Performance

MARCH 17, 2020

Back in 2014, I wrote an article called Performance Tuning the Whole Query Plan. It has 32GB RAM, with 24GB available to the SQL Server 2019 instance. The Sort only has 19 rows to process, so it consumes only 1ms or so. Having a wide range of tools available is generally speaking a good thing when tuning queries.

Servers 86

Servers Tuning Database Efficiency 86

Alex Russell

MARCH 6, 2021

Devices and networks have evolved too: Alex Russell @slightlylate An update on mobile CPUs and the Performance Inequality Gap: Mid-tier Android devices (~$300) now get the single-core performance of a 2014 iPhone and the multi-core perf of a 2015 iPhone. Modern network performance and availability. Content Is Dead, Long Live Content.

Performance 124

Performance Network Cache Metrics 124

Abhishek Tiwari

NOVEMBER 3, 2018

Unfortunately, to make it worse most of the CMS deals are managed by marketing and digital functions of the organisation, and in my own experience, these functions are often not equipped to ask hard and right questions during the CMS selection process. Circa 2014, I was working with a big Japanese automotive brand in Australia.

Systems 63

Systems Cache Website Network 63

Percona

JANUARY 14, 2019

Processed 4.15 With the latest ClickHouse version, all of these features are available, but some of them may not perform fast enough. Processed 4.15 Processed 8.19 Processed 8.19 Processed 4.15 Processed 3.05 toDate(max(created_utc))??????count()?? count()?? ? 2006-01-01 ? 2018-05-31 ? 1 rows in set.

Database 40

Database Analytics Blockchain Healthcare 40

KeyCDN

OCTOBER 10, 2018

Although a beta version was released in 2014, the first stable release of Kubernetes was just made available in September 2018. The master server uses what’s called a declarative plan to run applications most efficiently using the available infrastructure. Docker’s job, of course, is to create and manage containers.

Virtualization 47

Virtualization Open Source Network Architecture 47

Smashing Magazine

OCTOBER 27, 2021

Since 2014 , however, mobile users have been gaining more and more importance. The metrics available in eye-tracking can vary from tool to tool. Including eye-tracking in the process of usability testing can offer many benefits for UX teams. Web designers worked until recently with a desktop-first approach. Online Shopping.

Mobile 114

Mobile Website Hardware Social Media 114

Brendan Gregg

NOVEMBER 28, 2017

At Netflix, we've been using these technologies as they've been made available for instance types in the AWS EC2 cloud. AWS EC2 uses a different image type and boot process for PV and HVM, as described on the [Linux AMI Virtualization Types] page. It's all a bit confusing, and I wrote about this in 2014: [Xen Modes].

Virtualization 40

Virtualization AWS Hardware Storage 40