Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. Reads usually have apps waiting on them; writes may not (write-back caching). total used free shared buff/cache available Mem: 64414 15421 349 5 48643 48409 Swap: 0 0 0. Counting cache functions.

Cache 105

Cache C++ AWS Latency 105

The Morning Paper

MARCH 8, 2020

This paper presents Snowflake design and implementation along with a discussion on how recent changes in cloud infrastructure (emerging hardware, fine-grained billing, etc.) The caching use case may be the most familiar, but in fact it’s not the primary purpose of the ephemeral storage service. joins) during query processing.

Storage 112

Storage Engineering Cache Serverless 112

The Netflix TechBlog

NOVEMBER 3, 2022

In the time since it was first presented as an advanced Mesos framework, Titus has transparently evolved from being built on top of Mesos to Kubernetes, handling an ever-increasing volume of containers. This blog post presents how our current iteration of Titus deals with high API call volumes by scaling out horizontally.

Cache 224

Cache Latency Traffic Systems 224

KeyCDN

DECEMBER 8, 2022

While this was the case in the past, this won't be an accurate statement for the present WordPress. Many factors affect the speed of your WordPress website; some of them are: Your web host Server-side optimizations (PHP version, compression, caching, etc.) So let's discuss the process one step at a time. Why is WordPress slow?

Cache 52

Cache Website Speed Website Performance 52

Percona

MAY 2, 2023

Let’s look at some questions I did that a MySQL DBA usually needs to answer in an interview process. ChatGPT: The InnoDB buffer pool is used by MySQL to cache frequently accessed data in memory. If we expand the cache concept more, the buffer pool could be even less if the working set (hot data) is smaller.

Social Media 119

Social Media Database Servers Cache 119

Dynatrace

OCTOBER 15, 2020

The unique Dynatrace OneAgent for Go monitoring allows you to monitor your statically linked Go processes in the same way as is already possible for dynamically linked Go processes. The next step for all Go applications is to create a process-monitoring rule that enables deep monitoring of each statically linked Go application.

Transportation 186

Transportation Monitoring Metrics Code 186

SQL Performance

MARCH 29, 2022

Simple parameterization has a number of quirks in this area, which can result in more parameterized plans being cached than expected, or finding different results compared with the unparameterized version. Reputation = 252552 ; These statements result in six cached plans, three Adhoc and three Prepared : Different guessed types.

Cache 90

Cache Servers Database Testing 90

Alex Russell

MARCH 31, 2022

Browsers will cache tools popular among vocal, leading-edge developers. There's plenty of space for caching most popular frameworks. The best available proxy data also suggests that shared caches would have a minimal positive effect on performance. Browsers now understand the classic shared HTTP cache behaviour as a privacy bug.

Cache 82

Cache Government Traffic Network 82

Percona

SEPTEMBER 28, 2023

Whenever you install your favorite MySQL server on a freshly created Ubuntu instance, you start by updating the configuration for MySQL, such as configuring buffer pool, changing the default datadir director, and disabling one of the most outstanding features – query cache. This file is present in /proc/$pid/oom_score_adj.

Servers 109

Servers Best Practices Database Open Source 109

Brendan Gregg

FEBRUARY 28, 2023

DDR6: Here's What to Expect in RAM Modules,” [link] Nov 2020 - [Salter 20] Jim Salter, “Western Digital releases new 18TB, 20TB EAMR drives,” [link] Jul 2020 - [Spier 20] Martin Spier, Brendan Gregg, et al.,

Performance 110

Performance Latency Cache Virtualization 110

Adrian Cockcroft

JANUARY 29, 2023

I presented this analysis of response time distributions talk in 2016 — at Microxchg in Berlin ( video ). For high traffic systems, processing the individual response times for each request may be too much work. I’ve been thinking about this for a long time. > system.time(wait1 <- normalmixEM(waiting, mu=c(50,80), lambda=.5,

Lambda 98

Lambda Latency Cache C++ 98

SQL Server According to Bob

NOVEMBER 8, 2016

Note: We received feedback that there was some confusion on us calling this functionality “tail of the log caching” because our documentation and prior history has referred to the tail of the log as the portion of the hardened log that has not been backed up. Tail Of Log Caching.

Cache 40

Cache Servers Media Storage 40

Scalegrid

NOVEMBER 23, 2023

The host variable can be found within specified code strings dedicated to creating/modifying content present on that particular remotely located Postgresql platform system. Clearing your local machine’s DNS cache and setting up conditional forwarders on Hub VNET for customizing the DNS Server may help solve these issues.

Database 130

Database Servers Storage Network 130

CSS Wizardry

MARCH 3, 2019

To this end, having a solid caching strategy can make all the difference for your visitors. ?? How is your knowledge of caching and Cache-Control headers? That being said, more and more often in my work I see lots of opportunities being left on the table through unconsidered or even completely overlooked caching practices.

Cache 264

Cache Latency Strategy Servers 264

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. Here are the top ten tools you can run and present as a generic BPF observability dashboard, along with suggested visualizations: Tool Shows Visualization.

Latency 145

Latency Cache Energy Systems 145

Smashing Magazine

SEPTEMBER 20, 2021

They all generally are instrumented as JavaScript processes that are loaded onto your site’s web pages through a tag or snippet of loader code. Attempted modifications in JavaScript might break page functionality, inhibit proper rendering, or present other problems. Search Engine And Web Archive Cached Results. Large preview ).

Website 89

Website Analytics Google Cache 89

The Netflix TechBlog

MARCH 5, 2019

the order of the rows on your Netflix home page, issuing content licenses when you click play, finding the Open Connect cache closest to you with the content you requested, and many more). In the last section, we will attempt to feed your curiosity by presenting a set of opportunities that will drive our next wave of impact for Netflix.

Infrastructure 182

Infrastructure Cloud Scalability AWS 182

Brendan Gregg

AUGUST 29, 2021

Problem Statement The microservice managed and processed large files, including encrypting them and then storing them on S3. Reads usually have apps waiting on them; writes may not (write-back caching). This is a 64-Gbyte memory system, and 48 Gbytes is in the page cache (the file system cache). This is "cache busting."

Cache 40

Cache C++ AWS Systems 40

Testsigma

JUNE 3, 2021

These software errors are usually uncovered during functionality testing, mostly can be present as: Difficult/ confusing functionality: If the user is unable to understand or perform a function on the application, then it should change. Example: An e-commerce website is unable to process the payment part. Functional errors.

Software 82

Software Software Testing Hardware 82

Tim Kadlec

JUNE 21, 2022

At #SmashingConf San Francisco , Robin Marx gave a presentation about HTTP/3. The browser stores alt-svc info in alt-svc cache. Because of the alt-svc process, testing to compare HTTP/2 and HTTP/3 is tricky. Here are my notes. All major browsers support thanks to iOS starting with version 16. What and Why?

Network 64

Network Mobile Google Cache 64

SQL Performance

OCTOBER 20, 2022

The engine processes the row through parent operators before releasing the shared lock prior to locking and reading the next row. When the engine chooses page-level locking granularity, it takes and holds a shared page lock while processing rows on the current page and then releases the lock right before acquiring a lock on the next page.

Testing 91

Testing Servers Cache Engineering 91

Smashing Magazine

AUGUST 20, 2021

Jamstack CMS: The Past, The Present and The Future. Jamstack CMS: The Past, The Present and The Future. When we talk about static site generators, incremental regeneration, or instant cache invalidation, it’s enough to make the layman’s eyes glaze over. Mike Neumegen. 2021-08-20T08:00:00+00:00. 2021-08-20T09:19:47+00:00.

Ecommerce 139

Ecommerce Website Government Internet 139

The Netflix TechBlog

OCTOBER 18, 2019

The key insight was that by assuming a latent Gaussian Process (GP) prior on the key business metric actions like viral engagement, job applications, etc., In particular, he talked about the misattribution potential in a complex microservice architecture where often intermediary results are cached.

Infrastructure 126

Infrastructure Metrics Architecture Efficiency 126

Tim Kadlec

APRIL 12, 2020

The cache hit was very low (a topic for another day), and whenever the server had to provide a fresh version of the page, it was taking an unacceptably long time more often than not. The profiler takes a JSON object of data about how long Shopify spent rendering the Liquid template and then presents that data in the form of a flame graph.

Tuning 69

Tuning Cache Network Servers 69

The Morning Paper

DECEMBER 1, 2019

Memory might be durable, but… …it is expected that caches and registers will remain volatile. State-of-the-art constructions of durable lock-free sets, denoted Log-Free Data Structures, were recently presented by David et al., Link-free sets. The link-free algorithm adds two validity bits to each node.

Efficiency 60

Efficiency Cache C++ Performance 60

Brendan Gregg

FEBRUARY 28, 2023

DDR6: Here's What to Expect in RAM Modules,” [link] , Nov 2020 [Salter 20] Jim Salter, “Western Digital releases new 18TB, 20TB EAMR drives,” [link] , Jul 2020 [Spier 20] Martin Spier, Brendan Gregg, et al.,

Performance 52

Performance Latency Cache Virtualization 52

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. Present it to the team.

Performance 237

Performance Speed Google Media 237

The Netflix TechBlog

OCTOBER 18, 2019

The key insight was that by assuming a latent Gaussian Process (GP) prior on the key business metric actions like viral engagement, job applications, etc., In particular, he talked about the misattribution potential in a complex microservice architecture where often intermediary results are cached.

Infrastructure 100

Infrastructure Metrics Architecture Efficiency 100

ACM Sigarch

MARCH 18, 2019

This Part 1 discusses Bottleneck Analysis and Little’s Law, while Part 2 presents the M/M/1 Queue. To this end, we present three simple models that we find useful like Amdahl’s Law, split here into two blog posts. Assume that your organization processes travel reimbursements and wants to know the average processing time (latency).

Systems 60

Systems Latency Performance Analytics 60

ACM Sigarch

FEBRUARY 23, 2018

The rest of the article presents some examples of this behavior and how it impacts our field, whether we care to admit it or not. Present Bias. In Thaler’s book, he uses the term “present bias” to describe how people discount the future and give larger weight or value to decisions that are closer in time. Discounting the Past.

Architecture 47

Architecture Cache Hardware Virtualization 47

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. Disadvantages: While MariaDB is a popular and widely-used RDBMS, it can present some disadvantages to users that may not be present in others.

Open Source 52

Open Source Servers Storage Scalability 52

Dynatrace

SEPTEMBER 17, 2019

Instead of presenting you with a handful of random screenshots from our demo environment I reached out to Robert, a close friend of mine, who leads a development team with the current task to re-architect and re-platform their multi-tenant SaaS-based eCommerce platform. REDIS for caching. NGINX as an API Gateway. 3 Log Analytics.

AWS 128

AWS Monitoring Ecommerce Lambda 128

CSS - Tricks

JULY 25, 2019

Cache-Headers missing? Lighthouse records metrics from the browser, applies a scoring model to them, and presents an overall performance score. This process works by obtaining mobile 75th and 95th percentiles from HTTP Archive , then applying a log normal function. After that, it’ll be mitigated by cache. In PageSpeed 5.0,

Google 71

Google Engineering Speed Mobile 71

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

ACM Sigarch

MARCH 25, 2019

Part 1 previously discussed Bottleneck Analysis and Little’s Law, while this post (Part 2) presents the M/M/1 Queue. It also presented Bottleneck Analysis and Little’s Law that can give initial answers to questions like: What is the maximum throughput through several subsystems in series and parallel?

Systems 53

Systems Latency Performance C++ 53

MachMetrics

DECEMBER 27, 2019

TTFB is typically reduced via server-side optimizations, such as enabling caching and database indexes. This metric is the time from a visitors first interaction with the page, until the browser is ready to process that event. This was one of the more shocking areas of the study. The hosting plan you select also plays a big role here.

Performance 52

Performance Speed Website Mobile 52

MachMetrics

JULY 15, 2020

When a user requests a website, the browser must process all the information available to determine the layout and style. If you’re building your website from scratch, this process is easy. These aren’t needed immediately, so we can load them after the DOM elements are presented.

Speed 78

Speed Website Cache Google 78