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DeWu Technology
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DeWu Technology

A platform for sharing and discussing tech knowledge, guiding you toward the cloud of technology.

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Recent Articles

Latest from DeWu Technology

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DeWu Technology
DeWu Technology
Nov 19, 2025 · Databases

How Our Self‑Built Redis Evolved: Architecture, SDK, and Performance Gains

This article details the three‑year evolution of a self‑built Redis service, covering its massive scale, architectural redesign, migration from LB to a custom DRedis SDK, same‑city active‑active near‑read support, Redis‑server version upgrades, instance specifications, proxy rate‑limiting, and extensive automation that together boost performance while cutting costs.

ArchitectureAutomationCache
0 likes · 17 min read
How Our Self‑Built Redis Evolved: Architecture, SDK, and Performance Gains
DeWu Technology
DeWu Technology
Nov 10, 2025 · Databases

How TiDB v7 Upgrade Boosted Performance and Solved Real‑World Issues

This article details the TiDB upgrade journey from version 5.3.3 to 7.5.x, covering architecture, new v7 features, migration strategies, encountered problems with full‑table scans and inaccurate aggregation plans, the solutions applied, and the measurable performance and stability gains achieved after the upgrade.

Database UpgradeDistributed SQLNewSQL
0 likes · 15 min read
How TiDB v7 Upgrade Boosted Performance and Solved Real‑World Issues
DeWu Technology
DeWu Technology
Nov 5, 2025 · Backend Development

How We Cut Rule‑Update Cycle from Weeks to Days: A Full‑Stack Case Study

This article details the end‑to‑end technical redesign of an e‑commerce management‑category system, covering business pain points, a layered backend architecture, core Java modules, data‑model design, data‑warehouse computation, automated rule validation, approval workflows, and the resulting efficiency gains that shrink rule‑update cycles to just one or two days.

ArchitectureE-commerceJava
0 likes · 13 min read
How We Cut Rule‑Update Cycle from Weeks to Days: A Full‑Stack Case Study
DeWu Technology
DeWu Technology
Nov 3, 2025 · Artificial Intelligence

How Large Language Models Boost Search Relevance: A Real‑World Case Study

This article explains how a leading e‑commerce platform leveraged large language models to overcome traditional search relevance challenges, detailing the iterative workflow, model distillation, performance gains, deployment results, and future directions for smarter, more accurate product search.

AIE-commercelarge language models
0 likes · 10 min read
How Large Language Models Boost Search Relevance: A Real‑World Case Study
DeWu Technology
DeWu Technology
Oct 29, 2025 · Artificial Intelligence

Why Chunking Can Make or Break Your RAG System – Practical Strategies & Code

This article explains how proper document chunking—choosing the right chunk size, overlap, and structure‑aware boundaries—directly impacts the relevance, factuality, and efficiency of Retrieval‑Augmented Generation pipelines, and provides multiple Python implementations ranging from simple fixed‑length splits to semantic and hybrid approaches.

ChunkingEmbeddingLLM
0 likes · 29 min read
Why Chunking Can Make or Break Your RAG System – Practical Strategies & Code
DeWu Technology
DeWu Technology
Oct 22, 2025 · Backend Development

Why Spring’s Circular Dependency Can Crash Your Service and How to Fix It

A backend admin service failed to start due to a Spring circular‑dependency error where a bean was injected in its raw form before AOP proxy creation, exposing the limits of Spring’s three‑level cache and prompting a detailed analysis of the root cause and practical solutions.

AOPBean CreationDependency Injection
0 likes · 30 min read
Why Spring’s Circular Dependency Can Crash Your Service and How to Fix It
DeWu Technology
DeWu Technology
Oct 20, 2025 · Backend Development

How Apex Turns AI into a Seamless VSCode Plugin: Architecture, Auth, and Automation Explained

This article details the technical design of the Apex VSCode plugin, covering its background, overall architecture, activation flow, SSO authentication, rule‑knowledge‑base engineering, remote Webview integration, version orchestration, project service handling, logging, and future enhancements for AI‑driven development efficiency.

AuthenticationVSCodeVersion management
0 likes · 12 min read
How Apex Turns AI into a Seamless VSCode Plugin: Architecture, Auth, and Automation Explained
DeWu Technology
DeWu Technology
Oct 15, 2025 · Backend Development

Unlock Fastjson: Inside Its High‑Performance Serialization Engine

This article dissects Alibaba's Fastjson library, explaining its architecture, core modules, project structure, serialization and deserialization processes, ASM‑based performance optimizations, AutoType security mechanisms, and streaming API, while providing code examples and practical insights for Java developers.

FastjsonJavadeserialization
0 likes · 29 min read
Unlock Fastjson: Inside Its High‑Performance Serialization Engine
DeWu Technology
DeWu Technology
Oct 13, 2025 · Backend Development

TTL Agent Pitfalls: Memory Leaks & CPU Spikes in Java – Cases & Fixes

This article explains how the Transmittable ThreadLocal (TTL) Java agent works, why improper usage can cause context contamination, memory leaks, and CPU spikes, and provides real production cases, code examples, and practical recommendations to avoid these pitfalls.

Java AgentThreadLocalconcurrency
0 likes · 15 min read
TTL Agent Pitfalls: Memory Leaks & CPU Spikes in Java – Cases & Fixes