HP NonStop G-Series - Manual (Page 233)

Managing Index Partitions 16-6
Figure 16-3. View Partition Window.
Choose Index
Use the Index Catalog and Index panes to choose indexes.
1. In the list of catalogs shown in the Index Catalog field, double-click on
the catalog that contains the base index for the partition. The indexes in
the catalog are displayed in the Index field.
Double-click on the index you want to use as a index.
Assign Sample Rate
Enter the sample rate in the Sample Rate field.
Compute Row Distribution
Click on Compute. The elapsed time to compute the number of rows may
take a long time depending on the sample rate and size of the index. Click
on View to view the results.