HammerDB

FEBRUARY 25, 2021

HammerDB is a load testing and benchmarking application for relational databases. All the databases that HammerDB tests implement a form of MVCC (multi-version concurrency control). On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute.

Programming 67

Programming Benchmarking Virtualization C++ 67

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. Amazon even provides an official [recommendation] (2021): "For EC2 instances launched on the AWS Xen Hypervisor, it's a best practice to use the tsc clock source.

Speed 126

Speed Java AWS Virtualization 126

Alex Russell

APRIL 29, 2021

As an engineer on a browser team, I'm privy to the blow-by-blow of various performance projects, benchmark fire drills, and the ways performance marketing (deeply) impacts engineering priorities. With each team, benchmarks lost are understood as bugs. WebGPU is likely to ship in Chrome in late 2021. This is as it should be.

Media 145

Media Games Education Engineering 145

Percona

SEPTEMBER 1, 2023

This blog was originally published in November 2021 and was updated in September 2023. MySQL triggers are a powerful tool for database administrators and developers, enabling them to automate tasks, enforce data consistency, and respond to events within the database seamlessly. What is a Trigger in MySQL?

Cache 59

Cache Database Games Healthcare 59

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. Amazon even provides an official [recommendation] (2021): "For EC2 instances launched on the AWS Xen Hypervisor, it's a best practice to use the tsc clock source.

Speed 40

Speed Java AWS Virtualization 40

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. top(1) showed that only the Cassandra database was consuming CPU. Amazon even provides an official recommendation (2021): "For EC2 instances launched on the AWS Xen Hypervisor, it's a best practice to use the tsc clock source.

Speed 52

Speed Java AWS Virtualization 52

O'Reilly

JULY 25, 2023

I guessed that maybe ChatGPT only knew about v2 since it was trained on open-source code from before September 2021 (its knowledge cutoff date) and v2 was the dominant format before that date. Right now, widely-used benchmarks for AI code generation (e.g., Right now, widely-used benchmarks for AI code generation (e.g.,

Programming 98

Programming Code Design Benchmarking 98

SQL Server According to Bob

AUGUST 23, 2021

For example: A smaller sized, SQL Azure database , ​​ using 2 CPUs , ​​ could be assigned to CPU 2 and 3 on the host machine. ​​ Currently (Aug 2021):​​ S lo s less than 40​​ v core s ​​ leverage NO_AFFINITY.

Servers 40

Servers Azure Operating System Database 40

Alex Russell

MAY 9, 2022

They routinely benchmark against their competition on important flows and can understand when a competitor has taken the initiative to catch up (it rarely happens through a single commit or launch). When database speed or server capacity is the biggest variable, issues affect managers and executives at the same rate they impact end users.

Performance 86

Performance Latency Metrics Engineering 86