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cs.DB2026
Coverage Is Not Redundancy: Maintenance Cost and Exposure of Query-Aware Admission Indexes in Vector Databases Under Workload Drift
Prashant Kumar Pathak
In a vector database serving production-scale retrieval, a single inserted document can be retrieved for an anomalously large share of the query workload -- a retrieval hub -- and…
cs.DB2026
Pre-Execution Query Slot-Time Prediction in Cloud Data Warehouses: A Feature-Scoped Machine Learning Approach
Prashant Kumar Pathak
Cloud data warehouses bill compute based on slot-time consumed. In shared multi-tenant environments, query cost is highly variable and hard to estimate before execution, causing bu…
cs.DB2026
Heuristic Search Space Partitioning for Low-Latency Multi-Tenant Cloud Queries
Prashant Kumar Pathak, Chandra Biksheswaran Mouleeswaran, Rama Teja Repaka
Large-scale cloud security platforms must continuously query millions of structured cloud resource records distributed across thousands of tenant accounts. Broad, account-spanning…