This article explains how to create Python scripts that monitor Linux server CPU, load, memory, and network usage by reading data from the /proc virtual filesystem, providing step‑by‑step code examples and illustrating each script’s output with screenshots.
The talk explains how LeTV’s BOSS platform used sharding, a custom distributed ORM called Mango, and Snowflake‑style ID generation together with cluster‑level request routing to expand its order processing from hundreds of thousands to over a million transactions per second.
This article explains how large‑scale internet companies can reduce alarm storms and speed up incident resolution by creating an operations ecosystem centered on automated fault root‑cause localization, detailing the challenges, architecture, decision‑tree algorithms, and a four‑step implementation guide.
Safari 10.0 brings comprehensive support for IndexedDB, Shadow DOM, ES6, WebGL, advanced CSS properties, media autoplay, picture‑in‑picture, WebDriver, and native Apple Pay integration, enabling developers to build richer offline‑capable, secure, and high‑performance web applications on macOS and iOS.
This article chronicles the evolution of Taobao’s home page—from its early PHP implementation to a modern Node‑based platform—detailing architecture, module building, performance optimizations, stability safeguards, and agile practices that enable it to serve billions of daily page views.
An in‑depth case study of a sluggish SSRS report for Siemens China's MES system reveals how missing indexes, full‑table scans on billion‑row tables, and misguided partitioning cripple performance, and demonstrates practical SQL refactoring, stored‑procedure redesign, and indexing strategies that cut query time from hours to seconds.
This article explains how to implement access‑layer rate limiting in Nginx using built‑in modules, OpenResty Lua extensions, and token‑bucket or leaky‑bucket algorithms, with detailed configuration snippets, execution flow, testing procedures, and log analysis for robust traffic control.
The article explains how to design a producer‑consumer model using Java's BlockingQueue, customize ThreadPoolExecutor's rejection policies—especially replacing the default AbortPolicy with a blocking strategy via a custom RejectedExecutionHandler—to safely handle full queues and improve concurrency control.
This article chronicles Hotjar's evolution from a simple two‑server setup to a robust, eight‑server architecture handling billions of daily requests, sharing eight practical lessons on scaling, CDN usage, language choice, data storage, monitoring, and cost‑effective optimizations for fast‑growing web services.
This guide explains how to locate rows with identical values across one or several columns using self‑joins, GROUP BY, DISTINCT, and rowid, and provides step‑by‑step SQL statements to safely delete the extra duplicate entries from a table.
The article explains how SQL Server 2005 introduced schemas as separate namespaces, altering table ownership and permission rules compared to SQL Server 2000, and outlines the advantages such as role‑based access, easier user removal, default schema sharing, finer permission control, and business‑specific object organization.
This guide explains why Nginx returns 502 Bad Gateway, outlines common trigger conditions, and provides step‑by‑step commands and configuration tweaks—such as adjusting FastCGI process limits, timeout values, buffer sizes, and php‑fpm settings—to reliably resolve the issue.
This article examines typical C/C++ memory problems, classifying them into memory leaks and performance issues caused by fragmentation, explains root causes such as lost pointers, improper releases, unbounded allocations, and provides diagnostic examples and mitigation strategies using memory pools like tcmalloc.
BitMap, a space‑saving bit‑array structure, can replace costly I/O‑heavy Spark jobs for computing user active‑day distributions by converting joins and distinct operations into fast bitwise logic, enabling efficient 30‑day rolling metrics with minimal memory and superior performance, as demonstrated by real‑world benchmarks.
This article analyzes a poorly performing MES reporting SQL query that scans billions of rows, identifies indexing and partitioning shortcomings, and proposes a redesign using stored procedures, temporary tables, and query‑writing best practices to achieve sub‑second response times.
This article explains how WeChat’s seqsvr service generates trillions of per‑user sequence numbers with sub‑millisecond latency, detailing its core architecture, pre‑allocation and section‑sharing strategies, engineering implementation with StoreSvr and AllocSvr, and the evolution of its disaster‑recovery designs from primary‑backup to embedded routing tables.
This article explains Bootstrap 4's Sass architecture, shows how to use and customize its styles non‑destructively, and offers practical suggestions for reorganizing and enhancing the framework's Sass design for cleaner, more maintainable front‑end development.
This article outlines a comprehensive framework for assessing IT operations maturity by defining four core dimensions—availability, cost, efficiency, and technological advancement—along with quantitative metrics, scoring formulas, and practical methods for data collection and continuous performance improvement.
When a data center experiences sluggish network speeds despite connectivity, a systematic approach—checking device CPU usage, reviewing logs, using ping, verifying duplex settings, inspecting cables and modules, monitoring port status, conducting comparative tests, and scanning for malware—can pinpoint and resolve the underlying issues.
This article examines the performance bottlenecks of a no‑card payment platform—including database deadlocks, overly long transactions, CPU saturation, unbounded thread pools, and excessive logging—and presents concrete backend‑level refactorings, configuration changes, and code examples that dramatically improve scalability and reliability.
