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Mysql Query Optimization

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  1. Which system variable tells the optimizer to skip certain plans based on estimates of the number of rows accessed for each table?
    1. optimizer_search_depth
    2. optimizer_prune
    3. optimizer_prune_level
    4. optimizer_search
    5. None of these
Correct Option: C

The optimizer_prune_level variable tells the optimizer to skip certain plans based on estimates of the number of rows accessed for each table. This option is kept on by default.


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