Percona

JULY 7, 2023

In general terms, to achieve HA in PostgreSQL, there must be: Redundancy: To ensure data redundancy and provide continuous performance when a primary server fails, multiple copies of the database reside in replica servers. When the primary server fails, a standby server takes over as the new primary.

Availability 83

Availability Open Source Architecture Database 83

HammerDB

JUNE 27, 2022

It enables the user to measure database performance and make comparative judgements about database hardware and software. These factors meant that often when looking for database performance information, the results for a particular combination of software and hardware were not available. What is HammerDB? Why HammerDB was developed.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

The Morning Paper

OCTOBER 4, 2020

The study is based on one of the world’s first commercial 5G network deployments (launched in April 2019), a 0.5 Coverage is assessed with a walk-test (4-5km/h) over all road segments on the campus, monitoring the physical-layer information from both 5G and 4G at each location. km university campus. Let’s jump in!

Energy 130

Energy Latency Performance Network 130

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). SQL Server makes some timing adjustments in parallel plans to promote consistency, but they are not perfectly implemented.

Servers 95

Servers Tuning Architecture Processing 95

Brendan Gregg

SEPTEMBER 25, 2021

This server is spending about a third of its CPU cycles just checking the time! As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. This will slow this test a little.) 30.14% in the middle of the flame graph. But I'm not completely sure.

Speed 126

Speed Java AWS Virtualization 126

Alex Russell

MARCH 6, 2021

India has been the epicentre of smartphone growth in recent years, owing to the sheer size of its market and an accelerating shift away from feature phones which made up the majority of Indian mobile devices until as late as 2019. Hardware Past As Performance Prologue. So what did $150USD fetch in 2019? " package.

Performance 124

Performance Network Cache Metrics 124

Smashing Magazine

JANUARY 11, 2021

Testing And Monitoring Auditing workflow, proxy browsers, 404 page, GDPR cookie consent prompts, performance diagnostics CSS, accessibility. You can then mimic the 90th percentile’s experience for testing. Now you have something measurable to test against. Quick Wins. Download The Checklist (PDF, Apple Pages, MS Word).

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

Is it worth exploring tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, server push, clients hints, HTTP/2, service workers and — oh my — edge workers? Testing And Monitoring. You can then mimic the 90th percentile’s experience for testing. Table Of Contents.

Performance 145

Performance Cache Network Metrics 145

The Morning Paper

JULY 4, 2019

The ‘controlled’ part is important here because given the scale and complexity of the environment under test, the only meaningful place to do this is in production with real users. a bug fix, configuration change, new feature, or A/B test). Automating chaos experiments in production Basiri et al.,

Latency 77

Latency Engineering Metrics Traffic 77

HammerDB

OCTOBER 12, 2018

This post complements the previous best practice guides this time with the focus on MySQL and MariaDB and achieving top levels of performance with the HammerDB MySQL TPC-C test. As is also the case this limitation is at the database level (especially the storage engine) rather than the hardware level. hardware limits: 1000 MHz - 3.80

Best Practices 40

Best Practices Scalability Performance C++ 40

Brendan Gregg

SEPTEMBER 25, 2021

This server is spending about a third of its CPU cycles just checking the time! As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. This will slow this test a little.) 30.14% in the middle of the flame graph. But I'm not completely sure.

Speed 52

Speed Java AWS Virtualization 52

Dynatrace

NOVEMBER 20, 2019

Having released this functionality in an Early Adopter Release with OneAgent version 1.173 and Dynatrace version 1.174 back in August 2019, we’re now happy to announce the General Availability of OneAgent full-stack monitoring for Linux on the IBM Z platform, sometimes informally referred to as Z/Linux.

Availability 31

Availability Hardware Java Tuning 31

KeyCDN

JULY 11, 2019

Well, according to HTTP Archive , as of June 1, 2019 the average desktop page is 1,896.8 This is crucial due to mobile devices requiring additional optimizations because they typically have less powerful hardware and a slower network connection when compared to desktop devices. KB and the average mobile page is 1,683.5

Speed 52

Speed Website Mobile Latency 52

Dynatrace

AUGUST 8, 2019

The IBM Z platform is a range of mainframe hardware solutions that are quite frequently used in large computing shops. Typically, these shops run the z/OS operating system, but more recently, it’s not uncommon to see the Z hardware running special versions of Linux distributions. running on the 64-bit OS/390x platform.

Availability 25

Availability Hardware Java Tuning 25

Brendan Gregg

SEPTEMBER 25, 2021

This server is spending about a third of its CPU cycles just checking the time! As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. This will slow this test a little.) 30.14% in the middle of the flame graph. But I'm not completely sure.

Speed 40

Speed Java AWS Virtualization 40

O'Reilly

JULY 15, 2020

Most (74%) respondents say their teams own the build-test-deploy-maintain phases of the software lifecycle. Combined, technology verticals—software, computers/hardware, and telecommunications—account for about 35% of the audience (Figure 2). Success with microservices means owning the software lifecycle. Success with containers.

Database 135

Database Architecture Education Systems 135