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1 articles
01
2026-08-26
·
Databases
·
★ MEMBER
·
9 min read
Transactions and ACID — Concurrency Hell and the Isolation Levels
Why a balance never evaporates when the power dies mid-transfer, and why the bug that only shows up in production is almost always a concurrency bug. Atomicity, isolation levels, MVCC and deadlocks — from zero assumed knowledge down to the actual PostgreSQL and MySQL parameter names.