Index Advisor
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Default prefix of index name: (Default: QUEST_SX_IDX)
Enter the prefix that is placed on the index name when the Index Advisor automatically generates index candidates.
Calculate selectivity of indexes using a default sampling size of:
The selectivity is calculated from the number of rows that are selected from the table. The number of rows selected is determined by the following settings:
Top percentage of rows from table (Default = 10)
This number is used as a percentage to calculate the number of rows in the table that are retrieved in the sample which determines the selectivity of the data. You see the number of row used in the sample in the Select tables window.
Minimum number of rows (Default = 1000)
This is the minimum number of rows that are used in the sample which determines the selectivity of the data. This number is used if the calculation using the percentage of the table is below this value.
Maximum number of rows (Default = 10000)
This is the maximum number of rows that are used in the sample which determines the selectivity of the data. This number is used if the calculation using the percentage of the table is above this value.
Do not advise indexes for tables with row count less than (Default = 500)
Specify the number of rows that a table must have before index candidates are generated for any columns in that table.
Evaluate columns in SELECT list (Default = cleared)
For SELECT SQL statements, specify whether the columns in the SELECT list are considered when generating the alternative indexes.
Maximum number of columns in a composite index (Default = 4)
Specify the maximum number of columns that are placed in a composite index.
Maximum number of indexes to advise per table usage (Default = 3)
Specific the maximum number of indexes that the Index Advisor creates for each table in the SQL statement.