July 2025: Stability and reliability improvements for Runaway Query Detection in pingcap/tidb. Main change restructures the UpdateNewAndDoneWatch lifecycle to remove the initial blocking wait for syncer initialization, enabling immediate startup of relevant loops and continuous operation. Enhanced error logging for runaway watch sync failures to improve observability. Overall impact: reduced risk of deadlocks, improved uptime, and faster incident response with a lean, targeted change set.

June 2025 monthly summary for pingcap/tidb focusing on reliability and correctness improvements in DistSQL and resource group handling. No new user-facing features delivered this month; emphasis on fixing critical race conditions and reducing false positives to improve query planning, execution stability, and overall reliability.

April 2025 monthly summary focusing on core repos pingcap/tidb and qiancai/docs-cn. Delivered robustness improvements in TiDB resource-group management and enhanced PD observability/configurability in Qiancai/docs-cn. These changes reduce runaway query impact, improve cluster stability, and provide richer metrics for operational control.

March 2025 monthly summary for pingcap/tidb: Delivered a safe, testable feature flag for batch query region via a new system variable tidb_enable_batch_query_region, and updated dependencies to kvproto and pd/client. No major bug fixes documented this month. Highlights include implementing a global-scope, disabled-by-default flag to enable controlled rollout and experimentation, ensuring business teams can test impact before full adoption.