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. html [unroll the loop]: /blog/2014-04-26/the-noploop-cpu-benchmark.html How long does it take to read the time?

Speed 126

Speed Java AWS Virtualization 126

Brendan Gregg

MAY 16, 2017

As before, no one at Netflix has asked me to write this, and this is my personal blog and not a company post. When I joined Netflix in April 2014, we had over 40 million subscribers in 41 countries. eBPF]: /blog/2016-10-27/dtrace-for-linux-2016.html html [The PMCs of EC2]: /blog/2017-05-04/the-pmcs-of-ec2.html

Java 75

Java Entertainment Engineering Scalability 75

Dynatrace

FEBRUARY 25, 2021

Since its introduction by AWS in 2014, AWS Lambda has revolutionized the compute space and boosted the entire serverless movement. Much of what’s covered in this blog post is taken from that talk. In a future blog post, we’ll explain how to interpret Lambda metrics. Stay tuned?for Dynatrace news.

Lambda 221

Lambda AWS Monitoring Serverless 221

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. html [unroll the loop]: /blog/2014-04-26/the-noploop-cpu-benchmark.html [unused]: [link] [unused2]: [link]

Speed 40

Speed Java AWS Virtualization 40

SQL Performance

JUNE 21, 2019

I wrote a blog about it years ago too, however as time has marched on, guidance has changed a bit. Jonathan Kehayias has written an blog post How much memory does my SQL Server actually need , with a formula that helps establish the baseline for the maximum memory value. For many years I've found users making the same mistakes.

Servers 49

Servers Azure Hardware Database 49

Brendan Gregg

SEPTEMBER 5, 2017

Search for recent blog posts on Linux containers, and try them out, and you'll piece together their capabilities and workings bit by bit. Both Xen and KVM have had many performance and security improvements, and workloads can now be tuned to run at almost bare metal speeds (say, a 3% loss or less).

Virtualization 76

Virtualization AWS Engineering Hardware 76

Percona

JULY 30, 2018

5000 named Percona to their list in 2013, 2014, 2015 and 2016. Peter frequently speaks as an expert lecturer at MySQL and related conferences, and regularly posts on the Percona Database Performance Blog. Peter was an early employee at MySQL AB, eventually leading the company’s High-Performance Group.

Architecture 42

Architecture Database Open Source Internet 42

O'Reilly

JULY 25, 2023

So far I’ve read a gazillion blog posts about people’s experiences with these AI coding assistance tools. With the proper prompting and fine-tuning, I’m sure they can do much better here, and organizations like Khan Academy are already customizing GPT-4 to become a personalized tutor.

Programming 98

Programming Code Design Benchmarking 98

SQL Performance

MARCH 8, 2021

SQL Server 2014 SP2 and later produce runtime (“actual”) execution plans that can include elapsed time and CPU usage for each execution plan operator (see KB3170113 and this blog post by Pedro Lopes). This can make it difficult to draw sound performance-tuning conclusions.

Servers 95

Servers Tuning Architecture Processing 95

SQL Performance

MAY 7, 2019

Back in 2014, I started a series of blog posts here to talk about specific wait types and what they do and don’t mean. Understanding what these mean and how to investigate them is critical so you don’t succumb to what I call ‘knee-jerk performance tuning’ and waste time and effort trying to fix a problem that isn’t actually a problem.

Servers 40

Servers Azure Metrics Tuning 40

Percona

JANUARY 14, 2019

Vadim published a blog post about analyzing reddit comments with ClickHouse. In my previous blog post about ClickHouse I used it to find the most popular wikipedia page of the month. This is all true for ClickHouse, however, we may be able to live with it for our task. database: reddit table: rc_2017 mutation_id: mutation_858.txt

Database 40

Database Analytics Blockchain Healthcare 40