October 2025 — Percona Server reliability hardening focused on the audit-logging path. Delivered a critical bug fix: Audit Logging Overflow Prevention by changing the log-size counter accumulator from int to unsigned long long, addressing an overflow scenario that could cause rotation-related issues. Commit: 4d8941ba91c296c14dbc7ef64cd0f30272289a0e. This prevents unintended deletion of rotated log files when total size exceeds 2GB and improves reliability for large log sets. No new user-facing features this month; the changes deliver substantial business value through increased stability, data integrity, and scalability of production logging.

September 2025 monthly summary for developer work on percona/percona-server: Implemented Audit Log Rotation Collision Prevention to eliminate rotation stalls and prevent data loss during concurrent rotations. Introduced sequence-numbered log file names to ensure immediate rotation without overwriting within the same second. This fixes a critical stability issue in the audit subsystem and improves reliability for production deployments.

Two critical fixes delivered in 2025-08 for percona/percona-xtrabackup: 1) PXB-3591 domain migration fix updating bootstrap.sh to downloads.percona.com; 2) PXB-2724 RocksDB move-back fix ensuring actual moves rather than copies. Impact: improves deployment reliability after domain changes, fixes data movement semantics for RocksDB, reducing downtime and support overhead. Technologies: Bash scripting, domain migration handling, RocksDB integration, Git-based patching.