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Mar 20, 2024 · Databases

How MySQL Writes Binlog Logs: Buffer Management and trx_cache Reading

This article explains MySQL 8.0.32's binlog log file structure, the 8 KB in‑memory buffer (IO_CACHE), how binlog entries are written from trx_cache to the binlog file, and the detailed steps and code involved in reading from memory or temporary files and flushing to disk.