Summary for 2025-06: Key features delivered: Introduced Velox query_memory_reclaimer_priority configuration to prioritize memory reclamation for queries, enabling better global arbitration and more efficient memory usage based on query importance. Major bugs fixed: none reported this month. Overall impact and accomplishments: This change enhances predictability and efficiency of memory management under load, improving service quality for high-priority workloads and contributing to stable performance. Technologies/skills demonstrated: config-driven design, memory management heuristics, Velox core development, code review and collaboration (commit 79d4e4ffdeef402783af6dbd31ad66bb437e87f9, PR #13742).

May 2025 (IBM/velox): Delivered a priority-aware memory arbitration feature to improve quality-of-service under memory pressure. Added poolPriority_ to ArbitrationParticipant and MemoryPool and updated SharedArbitrator to prioritize lower-priority queries for aborts, preserving high-priority queries. This aligns with the memory-management design in PR #13386 and is recorded under commit 6c6ac4e83753b3b200294123416ca6fc38107492. The change enhances predictability for latency-critical workloads in memory-constrained scenarios and reduces risk of aborting important queries.

March 2025: Expanded analytics capabilities in IBM/velox by adding decimal type support to the histogram aggregate. Implemented long decimal/HUGEINT and short decimal support, added tests for grouped and global histograms, and linked the change to commit 919c890849524242620031f727a36504cec36d36 (#12811). This improves data type compatibility, enables more accurate distribution analysis, and broadens business value for decimal datasets.