Dedicated to Java tech sharing and dissecting top open-source projects. Topics include Spring Boot, Spring Cloud, Docker, Kubernetes and more. Author’s GitHub project “mall” has 50K+ stars.
This article explains how using UUIDs as primary keys in MySQL can degrade index efficiency, insert and query performance, and cause costly index refreshes on updates, then presents practical techniques such as ordered UUIDs, binary storage, hybrid keys, and partitioning to mitigate these issues.
This article provides a comprehensive guide to using Spring Boot's @ConfigurationProperties and @PropertySources annotations, covering their purpose, usage steps, code examples, and the differences between them for effective configuration management in Java backend applications.
Redis has introduced a multithreaded query engine that dramatically reduces latency and increases throughput—up to 16×—for vector similarity searches, enabling vertical scaling and better support for real‑time RAG applications compared to traditional single‑threaded architectures and competing vector databases.
Although many developers store IPv4 addresses in MySQL using VARCHAR(15), the optimal approach is to store them as a 32‑bit unsigned integer, which saves space, speeds up indexing, and can be easily converted with MySQL's inet_aton and inet_ntoa functions.
This guide introduces Meteor-Console, a customized, non‑intrusive Java diagnostic tool built on Arthas, explains its architecture, provides step‑by‑step installation commands, lists key features such as JVM class query and method monitoring, and shares the open‑source repository link.
This article introduces Jpom, a lightweight Java‑based tool that streamlines project building, automated deployment, server management, and monitoring, offering an easier alternative to Jenkins for individuals and small teams, with detailed feature lists, architecture overview, and step‑by‑step installation instructions.
This article explains the theoretical and practical limits of TCP connections on a Linux server, covering kernel parameters such as fs.file-max, soft/hard nofile and fs.nr_open, memory constraints, client port limits, and step‑by‑step configuration examples to maximize concurrent connections.
This guide walks through installing RedisInsight on Linux, setting environment variables, launching the service, deploying it with Kubernetes, and using its GUI to monitor and manage Redis instances, complete with command examples and configuration details.
This guide shows how to use IntelliJ IDEA's diagram feature to view, customize, and navigate Java Servlet inheritance and interface implementation graphs, including filtering classes, inspecting members, adjusting visibility, zooming, adding related classes, and jumping directly to source code.
This guide walks backend engineers through configuring Nginx for reverse proxy, load balancing, static‑resource handling, rate limiting with IP blacklists, and HTTPS encryption, providing ready‑to‑use code snippets and practical deployment steps to keep services stable and secure.
