March 2026 monthly summary for the pingcap/tidb repository. Delivered a targeted observability improvement by upgrading the Grafana metrics data source used for Kubernetes and TiDB monitoring, switching from DS_TEST-CLUSTER to DS_LIGHTNING to enhance reliability and performance of dashboards and alerts across cluster monitoring.

Month: 2025-11 — Delivered two targeted documentation enhancements to accelerate performance tuning across repos. 1) pingcap/docs-cn: Performance Tuning Documentation: THP and CPU Frequency Settings, adding practical links to THP and CPU frequency guidance to optimize system performance (commit 7c8acaf173b458ebc661256420aa9096dc804676). 2) pingcap/docs: Database performance optimization guidance, adding THP and I/O scheduler links to help operators tune database workloads (commit e87a91135733a78b7c1c58a68385dd41f7803149). Major bugs fixed: none reported this month. Overall impact: improved operator readiness and faster access to vetted tuning guidance, contributing to more reliable performance and streamlined onboarding. Technologies/skills demonstrated: Linux performance tuning concepts (THP, CPU frequency, I/O scheduler), documentation linking and cross-repo collaboration, git-based content updates and release discipline.

June 2025: Delivered targeted documentation improvements for pagination and a standardized log retention policy across deployment configurations, enhancing clarity for users and reliability for operators.