SShortSingh.
Back to feed

PGSimCity: Interactive Visual Guide Explains How PostgreSQL Works

0
·1 views

A developer named Nikolay has published an interactive educational resource called PGSimCity, hosted on GitHub Pages. The project uses a city simulation metaphor to explain the internal workings of the PostgreSQL database system. It aims to make complex database concepts more accessible through visual and intuitive storytelling. The resource was shared on Hacker News, where it received modest early attention. It serves as a learning tool for developers seeking a deeper understanding of PostgreSQL's architecture.

Read the full story at Hacker News

This is an AI-generated summary. ShortSingh links to the original source for the complete article.

Discussion (0)

Log in to join the discussion and vote.

Log in

Related stories

0
ProgrammingDEV Community ·

How Amazon ECS Deployment Circuit Breaker Automatically Detects and Rolls Back Failures

Amazon ECS includes a deployment circuit breaker that monitors service health during updates and automatically rolls back if critical failures are detected. The feature tracks container health checks, load balancer target group health, and overall service stability throughout the deployment process. A rollback is triggered when newly deployed tasks repeatedly fail health checks, when unhealthy tasks cause the running count to drop below the configured minimumHealthyPercent threshold, or when the deployment stalls entirely. Users must explicitly enable the circuit breaker in their service's deployment configuration alongside settings like maximumPercent and minimumHealthyPercent. Once a failure is detected, ECS halts the deployment, terminates unhealthy new tasks, and allows the existing healthy tasks to continue serving traffic.

0
ProgrammingDEV Community ·

Top NFC Keychains for LinkedIn Networking: What to Look for in 2026

NFC-enabled keychains are gaining traction as a professional networking tool, allowing users to share their LinkedIn profiles with a single tap on any NFC-compatible smartphone. Unlike QR codes or paper business cards, these devices require no app installation from the recipient and work natively on both iOS and Android. Key selection criteria include fast read speeds of one to three seconds, durable construction suited for frequent use at events, and easy profile reprogramming when job details change. Several products in this category also offer additional features such as analytics dashboards, CRM integrations, and team management tools. Reviewers and editors recommend prioritizing items with 4.0-plus star ratings and verified buyer feedback confirming successful LinkedIn sharing in real-world networking settings.

0
ProgrammingDEV Community ·

How to Build a Probability-Teaching Dice Roller with Histograms and CSV Export

A developer tutorial on DEV Community walks through building a statistically rigorous dice roller in JavaScript that goes beyond a single random number call. The project addresses common pitfalls such as mixing trial counts with face observation counts, which can produce misleading histogram probabilities. The implementation separates dice-rolling logic, state management, and DOM rendering into distinct functions, making the tool easier to test, animate, and extend with batch rolling. Key features include frequency histograms, running averages, and CSV export of trial history. The article also cautions that JavaScript's Math.random() is suitable for educational tools but must not be used in security-sensitive contexts.

0
ProgrammingDEV Community ·

Developer Benchmarks 2019 GPT-2 XL Against 2025 Qwen3 on Local AMD Hardware

A developer with no prior experience running local AI models set out to compare OpenAI's 2019 GPT-2 XL against the 2025 Qwen3-0.6B, running both on a personal laptop using AMD's Lemonade local AI server. The experiment, dubbed 'Second Squeeze,' aimed to measure how much AI capability had changed in six years despite the newer model being less than half the size of the older one. An initial speed measurement showed a 297x performance gap, but a reproducibility check revealed the figure was flawed due to cold-start conditions, with the corrected gap settling at approximately 11x. The developer also encountered a dead end attempting to replicate GPT-2's original 2019 accuracy benchmark, as the local server did not return the probability data the standard evaluation tool required, prompting an open-source issue filing. The project highlighted lessons in reproducibility and iterative problem-solving over raw benchmark results.

PGSimCity: Interactive Visual Guide Explains How PostgreSQL Works · ShortSingh