Estimating the size of the Domain Index

The size of a Domain Index is related to the size of the data being indexed, not to the size of the database. A small database with a lot of text can generate a larger index than a large database that has a lot of design elements. There is no easy way to measure the data in a database, but you can use a percentage of database size to estimate the size of the Domain Index.

About this task

You can use the hidden view $MultiDbIndex in the Domain Catalog to find the sizes of all databases selected for indexing. You can also use this view to find out which of these databases have already been indexed individually by their database managers -- and use full-text index size as a more accurate indicator of the space a database will take up in the Domain Index.


  1. From the Domino® Administrator, choose File > Application > Open.
  2. Select the cataloging server for the domain, and then select Domain Catalog.
  3. Hold down CTRL-SHIFT and click Open.
  4. In the view pane, click ($MultiDbIndex).
  5. For each database listed, double-click the database entry to display the Database Entry document.
    Note: If more than one replica of a database is listed, the indexing server indexes the replica on the server you include in the Limit domain wide indexing to the following servers field when you create the index. If this field is blank, the indexing server indexes the replica with the greatest number of documents.
  6. Do one of the following for each database set to be part of the Domain Index:
    • If there is a value in the Number of bytes indexed field on the Full Text tab, record it.
    • If there is no value in the Number of bytes indexed field, record a number between 20 and 40 percent of the value in the Database size field on the Database tab. Record 20 percent if the database is heavy on design, 40 percent if it is heavy on text.
  7. Add the values from Step 6 to obtain an estimate of the Domain Index in bytes.
    Tip: To convert your estimate to megabytes, divide by 1024 twice.