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» Automated Statistics Collection in DB2 UDB
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VLDB
2004
ACM
124views Database» more  VLDB 2004»
11 years 10 months ago
Automated Statistics Collection in DB2 UDB
The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably lo...
Ashraf Aboulnaga, Peter J. Haas, Sam Lightstone, G...
SIGMOD
2005
ACM
174views Database» more  SIGMOD 2005»
11 years 11 months ago
Automated statistics collection in action
If presented with inaccurate statistics, even the most sophisticated query optimizers make mistakes. They may wrongly estimate the output cardinality of a certain operation and th...
Peter J. Haas, Mokhtar Kandil, Alberto Lerner, Vol...
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