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TIBCO ActiveSpaces® - Enterprise Edition 5.0.0

# Secondary Indexes

A secondary index can increase query efficiency by reducing the number of rows to examine.

A secondary index can span one or more columns, and can include columns that are part of the primary key.

You can use the same column in more than one index.

Limit the number of secondary indexes, because each index increases the size of the information stored in the grid, and increases the overhead for each write operation.

As an administrator, create indexes that improve the performance of frequent query patterns. Delete indexes that no longer serve that purpose. For information about query performance, see "Efficiency of Filters" in TIBCO ActiveSpaces® - Enterprise Edition Concepts.

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TIBCO ActiveSpaces® - Enterprise Edition

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