Query Processing and Optimization
Query Processing and Optimization
Query Processing and Optimization
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• Per relation<br />
• Tuple size<br />
Relevant Statistics<br />
• Number of tuples (records): r<br />
• Load factor (fill factor), percentage of space used in each<br />
block<br />
• Blocking factor (number of records per block): bfr<br />
• Relation size in blocks: b<br />
• Relation organization<br />
• Number of overflow blocks<br />
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