Deadlock on PlumePHPhttps://plumephp.com/tags/deadlock/Recent content in Deadlock on PlumePHPHugozh-CNSun, 27 Sep 2026 11:00:00 +0800PostgreSQL 事务、隔离级别与锁：MVCC 快照、行锁/表锁、死锁检测与长事务治理https://plumephp.com/postgres-transaction-isolation/Sun, 27 Sep 2026 11:00:00 +0800https://plumephp.com/postgres-transaction-isolation/<p>事务是数据库正确性的最后一道防线。PostgreSQL 的并发控制基于 <strong>MVCC（Multi-Version Concurrency Control）</strong>：读不阻塞写、写不阻塞读，通过快照实现隔离。但&quot;快照&quot;的语义因<strong>隔离级别</strong>而异，锁的冲突与死锁又让并发问题变得隐蔽。</p>