Diagnosis
With the conversion it is determined that standard indexes are missing.The report SAP_INFOCUBE_INDEXES_CHG_DB4 adjusts only existing indexesto the new index concept and deletes obsolete indexes. Missing indexesare not created.

Procedure
You can repair missing indexes with the report
SAP_INFOCUBE_INDEXES_REPAIR. Since this can take a long time with largetables, we recommend that you schedule the report as a batch job.
You can read units about the indexing schema for BW fact tables fromDB2/400 in SAP Note 407528.