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  "markdown": "When choosing between **PostgreSQL** and **MySQL** for **high write workloads**, the decision comes down to how each database handles **concurrency**, **storage architecture**, and **background maintenance**.\n\n#### Core Architectural Differences Under Writes\n\n| Feature | PostgreSQL | MySQL (InnoDB) |\n| --- | --- | --- |\n| MVCC Model | Append-only row versions (requires `AUTOVACUUM` tuning) | In-place clustered primary key updates via undo logs |\n| Concurrent Writes | Strong under complex mixed read/write & JSONB indexing | Predictable throughput for simple primary-key OLTP updates |",
  "text": "When choosing between PostgreSQL and MySQL for high write workloads, the decision comes down to how each database handles concurrency, storage architecture, and background maintenance...",
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      "text": "Core Architectural Differences Under Writes"
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      "title": "MySQL or PostgreSQL? A Workload-by-Workload Decision Guide",
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    "What is the approximate write volume (e.g., rows per second)?",
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