Automated Statistics Collection in DB2 UDB

  title={Automated Statistics Collection in DB2 UDB},
  author={Ashraf Aboulnaga and Peter J. Haas and Sam Lightstone and Guy M. Lohman and Volker Markl and Ivan Popivanov and Vijayshankar Raman},
The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably long query processing times. Configuration and maintenance of these statistics has traditionally been a time-consuming manual operation, requiring that the database administrator (DBA) continually monitor query performance and data changes in order to determine when to refresh the statistics values and when and how to… CONTINUE READING
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