To optimize the performance of those queries that search
a class property, create an index for the property in the object store
database. The property cannot be a system property.
Important: The addition of each new database index increases
the time that
Content Platform Engine takes
to add documents to an object store. A performance trade-off therefore
exists between adding documents and running queries. For this reason,
create a database index only for a property that you search frequently.
For more information about the effect of indexes on query performance,
see
Tuning database queries.