Brendan Gregg

JUNE 3, 2021

It was 2005, and I felt like I was in the eye of a hurricane. However, I was doing training and consulting for Sun, helping their customers with system administration and performance. Another difference was that there were few roles in Australia for engineers in 2005, unlike the US. You can't make this stuff up.

Open Source 40

Open Source Code Engineering Technology 40

Brendan Gregg

MARCH 16, 2024

The problem is that this system has a default libc that has been compiled without frame pointers, so any stack walking stops at the libc layer, producing a partial stack that's missing the application frames. This is pretty common and usually goes unnoticed as the flame graph looks ok at first glance.

Java 145

Java Cache Google Hardware 145

SQL Server According to Bob

JANUARY 11, 2020

​​ Without limiting the rights under copyright, no part of this document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Microsoft Corporation.

Servers 40

Servers Cache Database Media 40

SQL Server According to Bob

DECEMBER 18, 2018

Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently. For example, if a flight booking reports that a seat has successfully been booked, then the seat will remain booked even if the system crashes.” – [link]. The Back Story.

Servers 90

Servers Media Cache Storage 90

SQL Performance

JANUARY 23, 2020

The queues component of our methodology comes from Performance Monitor counters, which provide a view of system performance from a resource standpoint.". However, some seem to have missed Davidson's point regarding the importance of resources and rely almost entirely on waits to present a picture of query performance and system health.

Tuning 115

Tuning Servers Monitoring Hardware 115

KeyCDN

MARCH 28, 2019

There are a myriad of options available when choosing which backend framework you want to work with. They are responsible for the implementation of database systems, ensuring proper communication between various web services, generating backend functionality, and more. Check out how to perform an Express CDN integration with KeyCDN.

Programming 77

Programming Website Scalability Design 77

Smashing Magazine

JULY 9, 2021

The British Standards Institution (2005) defines inclusive design as : “The design of mainstream products and/or services that are accessible to, and usable by, as many people as reasonably possible. Design systems should be used not only to ensure branding and consistency, but accessibility, inclusivity, and understanding of code better.

Website 145

Website Mobile Design Testing 145

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. It's amazing to recall that it was even possible to virtualize x86 before processors had hardware-assisted virtualization (Intel VT-x and AMD-V), which were added in 2005 and 2006.

Virtualization 111

Virtualization AWS Hardware Storage 111

John McCalpin

APRIL 2, 2020

The presentation discusses a family of simple performance models that I developed over the last 20 years — originally in support of processor and system design at SGI (1996-1999), IBM (1999-2005), and AMD (2006-2008), but more recently in support of system procurements at The Texas Advanced Computing Center (TACC) (2009-present).

Benchmarking 59

Benchmarking Performance Latency Architecture 59

SQL Performance

MARCH 30, 2021

The fundamentals of row mode parallel execution haven’t changed since SQL Server 2005, so the following discussion is broadly applicable. A parallel query might start out requesting DOP 8, but be progressively downgraded to DOP 4, DOP 2, and finally DOP 1 due to a lack of system resources at that moment. MonthlyPosts AS. (

Cache 98

Cache Servers Operating System Processing 98

IO River

NOVEMBER 2, 2023

Therefore, there might be cases where your system could experience a downtime during the migration process. For example, Akamai introduced ASI in 2005, which became the standard for building new websites. Specialized featuresSome vendors offer specialized features that are not available in competing CDNs.

Lambda 52

Lambda AWS Cache Website 52

The Agile Manager

JANUARY 31, 2016

The ecosystem strategy takes this even further, combining unrelated capabilities under one roof (eBay buying Skype in 2005, SAP developing HANA in 2010, Facebook buying Oculus in 2014), often justifiable if only because digital commerce is still in its infancy and nobody is really sure what's going to work and what's not.

Blockchain 40

Blockchain Retail Social Media Airlines 40

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. It's amazing to recall that it was even possible to virtualize x86 before processors had hardware-assisted virtualization (Intel VT-x and AMD-V), which were added in 2005 and 2006.

Virtualization 40

Virtualization AWS Hardware Storage 40

Highly Scalable

MARCH 10, 2015

Most of this article represents an overview of the results published by retailers and researchers who built practical decision making and optimization systems combining abstract economic models with data mining methods. The most typical use cases for this problem are recommender systems, personalized search results ranking, and targeted ads.

Retail 152

Retail C++ Analytics Metrics 152

Brendan Gregg

AUGUST 8, 2017

Linux load averages are "system load averages" that show the running thread (task) demand on the system as an average number of running plus waiting threads. This measures demand, which can be greater than what the system is currently processing. then your system is idle. - cat /proc/loadavg. 42/3411 43603. 42/3411 43603.

Latency 111

Latency Metrics C++ Systems 111

IO River

NOVEMBER 2, 2023

Therefore, there might be cases where your system could experience a downtime during the migration process. Not only that, but there can be cases where a piece of your application could break during the migration process that could take a long time to get back running.‍How does vendor lock-in occur?

Lambda 52

Lambda AWS Cache Website 52

The Agile Manager

MAY 7, 2010

How many different booking systems have your frequent flier numbers, know that you prefer an aisle to a window, and know that you prefer a vegetarian meal on long-haul flights? And how much of that has changed since you last edited your profile in each of those systems? We have a lot of redundant data. We lug this data around with us.

Storage 40

Storage Internet Internet Mobile 40