Testlodge

AUGUST 9, 2023

The tester established a baseline by selecting the most critical, common, or obvious path through the code selection. Steps to Performing Basis Path Testing The first step is to create a control flow graph for a specified code section. The second step is to select a baseline path through the code.

Testing 75

Testing Software Software C++ 75

Dynatrace

APRIL 21, 2022

Analyzing user experience to ensure uniform performance after migration. Performance efficiency. Some principles Microsoft provides across this area include: Choosing the right resources aligned with business goals that can handle the workload’s performance. Understanding resource utilization for cost management.

Azure 184

Azure Monitoring Virtualization Metrics 184

The Morning Paper

APRIL 16, 2019

Teaching rigorous distributed systems with efficient model checking Michael et al., It describes the labs environment, DSLabs , developed at the University of Washington to accompany a course in distributed systems. Enabling students to build running performant versions of all of those systems in the time available is one challenge.

Systems 43

Systems Efficiency Testing Strategy 43

The Netflix TechBlog

SEPTEMBER 8, 2020

On the Android team, while most of our time is spent working on the app, we are also responsible for maintaining this backend that our app communicates with, and its orchestration code. Image taken from a previously published blog post As you can see, our code was just a part (#2 in the diagram) of this monolithic service.

Latency 233

Latency Cache Java Traffic 233

Percona

AUGUST 8, 2023

As such, one of the more common questions I get from my clients is whether or not their system will be able to endure an anticipated load increase. Or worse yet, sometimes I get questions about regaining normal operations after a traffic increase caused performance destabilization. Do these queries use more caches?

Traffic 88

Traffic Cache Monitoring Database 88

Percona

DECEMBER 29, 2022

While working as a DBA, we perform many regular tasks, and one of them is upgrading our database systems. There are some techniques to perform a PostgreSQL database upgrade, such as data dump and import, logical replication, or in-site upgrade using pg_upgrade. If all is good, perform the upgrade removing the –check flag.

C++ 82

C++ Open Source Database Programming 82

The Netflix TechBlog

MAY 27, 2020

Reliability, formally speaking, is the ability of a system to function under stated conditions for a period of time. Put simply, reliability means a system should work and continue working. CORE is a team consisting of Site Reliability Engineers, Applied Resilience Engineers, and Performance Engineers. Technical Sleuthing?—?assisting

Engineering 104

Engineering Innovation Systems Architecture 104

Dynatrace

JUNE 1, 2021

Application performance monitoring (APM) is the practice of tracking key software application performance metrics using monitoring software and telemetry data. Practitioners use APM to ensure system availability, optimize service performance and response times, and improve user experiences. Performance monitoring.

Monitoring 148

Monitoring Mobile Social Media Artificial Intelligence 148

Particular Software

MARCH 28, 2022

You can create a class that is a lousy saga but is still perfectly valid C# code. With Roslyn analyzers and code fixes , we can now do a lot better and help guide you toward the pit of success. This will save you time, as you won’t have to run your code to find out that you can’t use DateTime as a correlation property type.

Development 52

Development C++ Virtualization Metrics 52

Percona

AUGUST 30, 2023

If a PostgreSQL user wants to change these values, they need to recompile the PostgreSQL from the source code. This can be changed later using the pg_checksums utility, but that will be a painful exercise on a big database. cat /usr/lib/systemd/system/postgresql-14.service. But another database might be an OLAP system.

Database 101

Database Servers Open Source Tuning 101

John McCalpin

AUGUST 1, 2018

Bandwidth, performance analysis has two recurring themes: How fast should this code (or “simple” variations on this code) run on this hardware? If I am analyzing (apparent) performance shortfalls, how can I distinguish between cause and effect ? The source code to the library may not be available.

Hardware 40

Hardware Transportation Performance Latency 40

Brendan Gregg

DECEMBER 21, 2019

For my AWS re:Invent talk on BPF Performance Analysis at Netflix, I began with a demo of "BPF superpowers" (aka eBPF). In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. My [BPF Performance Tools] book has plenty of examples.

C++ 52

C++ Education Java AWS 52

Brendan Gregg

DECEMBER 21, 2019

For my AWS re:Invent talk on BPF Performance Analysis at Netflix, I began with a demo of "BPF superpowers" (aka eBPF). In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. My [BPF Performance Tools] book has plenty of examples.

C++ 52

C++ Education Java AWS 52

The Agile Manager

AUGUST 31, 2021

If we accept the fact that Agile is a value system and not a set of mechanical processes, it stands to reason that there must be something different about the norms and behaviors of Agile managers vis-a-vis traditional managers. One person who does a substandard job affects the performance of the entire team.

Metrics 52

Metrics Design Engineering C++ 52

Tasktop

FEBRUARY 24, 2021

Get together once a year for a value stream mapping exercise, and you’ll emerge with a list of potential improvement hypotheses. . But from all those hotspots, identifying the system constraint , the one big, juicy bottleneck that is at this very moment is negating and undermining the benefits from your optimization efforts?

Healthcare 52

Healthcare Retail Metrics Innovation 52

MachMetrics

DECEMBER 12, 2019

Google has announced plans for a new badging system that would let users know whether a website typically loads slowly. If you’re using best practices and keeping web performance in mind, you shouldn’t need to worry about being badged. Most stemmed from Google exercising too much power with this move.

Google 86

Google Website Best Practices Internet 86

Dynatrace

SEPTEMBER 20, 2019

The new version of the application is deployed in the green environment and tested for functionality and performance. Let’s assume your team has just pushed new code and it passed pre-deployment testing. The alert comes with the full context of the issue, including errors caused, impacted systems, and level of severity.

Systems 26

Systems Traffic DevOps Database 26

Smashing Magazine

DECEMBER 2, 2021

Advent of Code. If you prefer a puzzle over an article, take a look at Advent of Code. Good ol’ PerfPlanet is back for another season with all things speed and web performance. Code Security Advent Calendar. Tune in each day for an article that explores the wide range of topics in system administration.

Design 108

Design Development Programming Website 108

The Morning Paper

JANUARY 23, 2020

With only an hour or so of degraded performance in the end, it’s not the worst incident you can imagine, but it was clearly taken as very serious given the time of year. ." The process tracing exercise included: Examning IRC transcripts from multiple channels. Capturing logs af any alerts that triggered during the outage.

Internet 53

Internet Internet Cache Engineering 53

Sutter's Mill

JANUARY 11, 2021

Assertions have been a foundational tool for writing understandable computer code since we could write computer code… far older than C’s assert() macro, they go back to at least John von Neumann and Herman Goldstine (1947) and Alan Turing (1949). Run-time errors should be reported using exceptions, error codes, or similar.

C++ 58

C++ Programming Code Testing 58

Testsigma

MARCH 6, 2020

Regression testing comprises re-running the test cases of already stable features and finding out if the new code changes attributed to the new release led to any negative impacts on the existing functionalities. Regression checks should start as soon as a new build is released for testing and should be repeated for every new code build.

Best Practices 52

Best Practices Testing Code Testing Tools 52

The Morning Paper

DECEMBER 8, 2019

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. Byte-addressable non-volatile memory,) NVM will fundamentally change the way hardware interacts, the way operating systems are designed, and the way applications operate on data. PLOS’19.

Hardware 56

Hardware Programming Media Storage 56

The Agile Manager

AUGUST 31, 2020

I've worked with quite a few companies for which long-lived software assets remain critical to day-to-day operations, ranging from 20-year-old ERP systems to custom software products that first processed a transaction way back in the 1960s. The first and most obvious is that they are long on how to start, but short on how to finish.

Architecture 52

Architecture Code Strategy Programming 52

Sutter's Mill

JANUARY 25, 2021

We want a way to enable checking for some assertions but not others in the same code, because we may not always be able to afford expensive checks. Example 1(a)’s min <= max is at this other end of the scale: It’s so dirt cheap to check that it’s unlikely we’ll ever have a performance reason to disable it. [2] in production).

C++ 45

C++ Programming Cache Testing 45

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 52

Latency Engineering Systems Hardware 52

Tasktop

FEBRUARY 24, 2021

Get together once a year for a value stream mapping exercise, and you’ll emerge with a list of potential improvement hypotheses. . But from all those hotspots, identifying the system constraint , the one big, juicy bottleneck that at this very moment is negating and undermining the benefits from your optimization efforts?

Healthcare 40

Healthcare Retail Metrics Innovation 40

Adrian Cockcroft

NOVEMBER 11, 2019

A resilient system continues to operate successfully in the presence of failures. There are many possible failure modes, and each exercises a different aspect of resilience. Hence, one way to reduce risk is to make systems more observable. This discussion focuses on hardware, software and operational failure modes.

Latency 53

Latency Engineering Systems Hardware 53

Alex Russell

AUGUST 30, 2021

Does Apple restrict, in any way, the ability of competing web browsers to deploy their own web browsing engines when running on Apple's operating system? Anyone who cares to download and fork the code can do so. House Antitrust Subcommittee includes their most specific claims: 4. If no, please explain why not.

Engineering 98

Engineering Open Source Website Operating System 98

The Morning Paper

AUGUST 27, 2019

I am so pleased to see a database systems paper addressing the concerns of the application developer! To the developer, a strongly consistent system behaves exactly like a single-threaded system running on a single node, so reasoning about the behaviour of the system is simple 1. That brings us to invariant confluence.

Programming 59

Programming Processing Database Systems 59

The Netflix TechBlog

FEBRUARY 10, 2021

Stranger Things imagery showcasing the inspiration for the Hawkins Design System by Hawkins team member Joshua Godi ; with art contributions by Wiki Chaves Hawkins may be the name of a fictional town in Indiana, most widely known as the backdrop for one of Netflix’s most popular TV series “Stranger Things,” but the name is so much more.

Design 230

Design Systems Engineering Entertainment 230

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific.

C++ 109

C++ Database Servers Code 109

Randon ASCII

OCTOBER 20, 2019

Normally ninja does an excellent job of saturating the system, keeping n+2 processes running at all times so that there is little idle time. When figuring out why a system is idle the CPU Usage (Precise) table is ideal. Instead we need to focus on when the system started working again. What is System (4) doing.

Processing 60

Processing Systems Code Software 60

Alex Russell

SEPTEMBER 20, 2020

Circa '07, those web apps were notably slower than native code could be. In '07, safety implied an unacceptable performance hit on slow single-core devices with 128MiB of RAM. New low-end devices are 4-to-8 core, 2GHz systems with 2GiB of RAM.

Hardware 64

Hardware Mobile Programming Java 64

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific.

C++ 93

C++ Database Servers Code 93

SQL Performance

SEPTEMBER 25, 2020

Here’s the only item I’ve found that made it to the new feedback system.). So I wrote some PowerShell code to step through a procedure to see which other tokens were identified. Open Visual Studio Code (or your favorite PowerShell IDE) and save a new file called Test1.ps1. However, the problem still exists in SQL Server 2019.

Code 42

Code C++ Database Servers 42

O'Reilly Software

MARCH 7, 2018

Build a more scalable, composable, and functional architecture for interconnecting systems and applications. Welcome to a new world of data-driven systems. Today, data needs to be available at all times, serving its users—both humans and computer systems—across all time zones, continuously, in close to real time.

Transportation 72

Transportation Java Programming Architecture 72

The Agile Manager

FEBRUARY 28, 2017

Management textbooks dating at least as far back as the 1980s included stories of employees performing tasks the reasons for which they didn't really understand. Tool 1: Dolly the Sheep Companies that are heavily rule-based - think insurance - eagerly moved their business rules into code. Why not put them back on the payroll?

Strategy 40

Strategy Java Code Systems 40