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Topics in Meeting Complex Service Level Objectives for Mixed Database Workloads

In operational business intelligence (BI) database systems, the same 
database may support mixed workloads, e.g. , short-running OLTP queries and batch jobs containing multitudes of queries with varying complexity. Different workloads may have different performance requirements, expressed in terms of service level objectives (SLOs). It is the task of a database administrator to manage the workload in order to fulfill the SLOs and, thus, to satisfy the objectives. This work investigates approaches and methods for dynamic prioritization of database requests, handling “problem queries”, and for automatically setting control parameter settings in an environment with workloads having multiple service classes to meet the service level objectives.