- Fixed numerous bugs across components including Atomic DDL, audit log gzip handling, InnoDB FTS memory usage, JSON processing, optimizer, thread pool, and SQL parser memory management.
- Added ability to enable/disable Telemetry meters via the performance_schema_meter parameter and introduced PGO build support for RPM packages on SLE/openSUSE and Fedora.
- Updated bundled libraries: upgraded zlib to 1.3.2, OpenSSL to 3.5.5, and opentelemetry‑cpp to version 1.23.0.
Changes in MySQL 8.4.9 (2026-04-21)
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Critical security patch addressing multiple vulnerabilities
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