Brendan Gregg

SEPTEMBER 25, 2021

How long does it take to read the time? How would you time time? 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. This is how Java flame graphs looked at the time.

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

How long does it take to read the time? How would you _time_ time? 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. This is how Java flame graphs looked at the time.

Speed 40

Speed Java AWS Virtualization 40

SQL Performance

APRIL 14, 2021

I keep being shocked by his discoveries, and wonder how the heck he figures out what he does. I keep being shocked by his discoveries, and wonder how the heck he figures out what he does. Often while reading his articles or posts, I shake my head and tell my wife, Lilach, that when I grow up, I want to be just like Paul.

C++ 112

C++ Servers Testing Code 112

Smashing Magazine

SEPTEMBER 21, 2021

How To Build Your Own Mouseless Development Environment. How To Build Your Own Mouseless Development Environment. I had no idea how I could solve the problems I was facing because I had no idea how Linux was working under the hood. All and all, it took me days to get back to the system I had before the crash.

Development 98

Development Energy Programming Efficiency 98

Nick Desaulniers

APRIL 6, 2020

“War stories” in programming are entertaining tales of truly evil bugs that kept you up at night. I don’t know how to debug a panic during early boot, and I’ve never had to; with everything I’ve learned up to this point, I’m afraid I won’t have it in me to debug this. Recent work. No output.

C++ 67

C++ Hardware Code Virtualization 67

Smashing Magazine

JUNE 30, 2021

In this article I’ll outline my mental model why multithreading is important on the web, I’ll give you an introduction to the primitives that we as developers have at our disposal, and I’ll talk a bit about architectures that make it easy to adopt multithreading, even incrementally. The Problem Of Unpredictable Performance. Large preview ).

Games 145

Games Architecture Code C++ 145

All Things Distributed

DECEMBER 20, 2017

This article titled " Daten müssen strategischer Teil des Geschäfts werden " appeared in German last week in the "IT und Datenproduktion" column of Wirtschaftwoche. How companies can use ideas from mass production to create business with data. Strategically, IT doesn't matter. The German startup SimScale makes use of this trend.

Artificial Intelligence 79

Artificial Intelligence Social Media Logistics AWS 79

Smashing Magazine

JANUARY 11, 2021

How do we actually know where we stand in terms of performance, and what exactly our performance bottlenecks are? And, most importantly, where do we even start improving performance and how do we establish a performance culture long-term? Back in the day, performance was often a mere afterthought.

Performance 145

Performance Cache Media Metrics 145

Percona

APRIL 17, 2023

Operating System (OS) settings Swappiness Swappiness is a Linux kernel setting that influences the behavior of the Virtual Memory manager when it needs to allocate a swap, ranging from 0-100. The swap issue is explained in the excellent article by Jeremy Cole at the Swap Insanity and NUMA Architecture. 25.84 - Total 21.04

Best Practices 52

Best Practices Design Tuning Database 52

Nick Desaulniers

MAY 30, 2016

This post is a follow up to my previous blog post about word size. This post is more about considerations when porting older code to newer machines, not about porting newer code to run on older machines. When I run that code on my x86-64 OSX machine, I get the following output: 1. Three C/C++ programmers walk into a bar.

C++ 59

C++ Programming Code Hardware 59

Nick Desaulniers

APRIL 18, 2014

’” “The machine language of the world,” Hiro says. ’” “The machine language of the world,” Hiro says. ” “Computers speak machine language,” Hiro says. “Is this another analogy? .’” “Is this another analogy?”

C++ 98

C++ Programming Code Virtualization 98

O'Reilly Software

MARCH 7, 2018

In this article, we will discuss the need for—and how to achieve—modernization in the field of enterprise integration. Working with never-ending streams of data necessitates continuous processing of it, ensuring the system keeps up with the load patterns it is exposed to, and always provides real-time, up-to-date information.

Transportation 72

Transportation Java Programming Architecture 72

SQL Server According to Bob

DECEMBER 18, 2018

Durability is a cornerstone of any database system and starting with SQL Server 2017 on Linux Cumulative Update 6 (CU6), SQL Server on Linux enables “Forced Flush” behavior as described in this article , improving durability on non-Fua optimized systems. “Be The Back Story. Starting with the Linux 4.18 4 Socket, TPCC. 2 Socket, TPCC.

Servers 90

Servers Media Cache Storage 90

Nick Desaulniers

MAY 25, 2015

Taking the time to do translation to native machine code ahead of time can result in better performance at runtime, but an interpreter can get to work right away without spending any time translating. All of the code in the post is up on GitHub. The other programs that might be compiled are C, C++, and to some extent Java and C#.

C++ 73

C++ Programming Code Architecture 73

SQL Performance

JUNE 21, 2019

This article will expand on my previous article and point out how these apply to SQL Server , Azure SQL Database , and Azure SQL Managed Instance. Misconfigured backups are detrimental to an organization when a recovery situation comes up. I've been teaching and writing about common SQL Server mistakes for many years.

Servers 49

Servers Azure Hardware Database 49

Randon ASCII

AUGUST 23, 2018

But first, a really quick summary of the original issue: In the last post I talked about how every time a CFG-enabled process allocates executable memory some Control Flow Guard (CFG) memory is allocated as well. Chrome was doing this and that was leading to an essentially unbounded waste of memory, and hangs on some machines.

Operating System 58

Operating System Code Processing Systems 58

Brendan Gregg

AUGUST 8, 2017

Most tools show three averages, for 1, 5, and 15 minutes: $ uptime 16:48:24 up 4:11, 1 user, load average: 25.25, 23.40, 23.46. top - 16:48:42 up 4:12, 1 user, load average: 25.25, 23.14, 23.37. $ Most tools show three averages, for 1, 5, and 15 minutes: $ uptime 16:48:24 up 4:11, 1 user, load average: 25.25, 23.40, 23.46.

Latency 111

Latency Metrics C++ Systems 111

O'Reilly

NOVEMBER 28, 2023

And everyone has opinions about how these language models and art generation programs are going to change the nature of work, usher in the singularity, or perhaps even doom the human race. Our survey focused on how companies use generative AI, what bottlenecks they see in adoption, and what skills gaps need to be addressed.

Open Source 108

Open Source Artificial Intelligence Google Infrastructure 108

Smashing Magazine

NOVEMBER 24, 2021

A map that blends past and present, a musical time machine bringing back distant memories, or an interactive graphic novel pulling you deeper and deeper into a powerful story — sometimes you come across a lovely little website that, well, instantly conquers your heart. Image credit: How Many Plants ). Covid Art Museum.

Website 121

Website Design Games Open Source 121