This article walks through the evolution of Java garbage collectors—from the early Serial collector to modern low‑latency ZGC and Shenandoah—explaining how throughput, pause time, and safepoints shape each collector’s design and what changes matter when upgrading from JDK 8 to JDK 17.
Serial execution runs tasks one after another, concurrency interleaves multiple tasks to appear simultaneous, and parallelism truly runs tasks at the same time on multiple cores, each offering distinct advantages and trade‑offs that affect efficiency, responsiveness, and programming complexity.
This article explains PostgreSQL's auto‑increment mechanism, covering built‑in serial data types, manual sequence creation, default value assignment, step‑by‑step code examples, and how to query indexes, offering a clear comparison with MySQL's auto_increment feature.
This article explains the seven Java garbage collectors available up to JDK 1.8, compares their strengths and weaknesses, and shows how to select and tune the appropriate collector—Serial, Parallel, CMS, or G1—based on application characteristics and deployment environments.
