Use the Set/Remove Indexing window to set indexing options for the class property displayed in the Class property definitions (General tab).
IMPORTANT For a large object store with many rows in a table, creating an index might take so long that it exceeds the application server's transaction timeout, resulting in an exception. For instructions on how to modify your application server's transaction timeout, see the documentation for your specific application server. If you change your application server's transaction timeout value and you are using Microsoft® SQL Server® as your database server, you must make a corresponding change in Microsoft Distributed Transaction Coordinator. If you are using a .NET client application to create an index, a fixed timeout value of 5 minutes is enforced on the client, regardless of the transaction timeout setting on the application server.