Here we would like to draw your attention to SA17 transaction code in SAP. As we know it is being used in the SAP BC-SRV (Basis Services / Communication Interfaces in Basis) component which is coming under BC module (BASIS).SA17 is a transaction code used for Index pools for duplicate check in SAP.
It comes under the package SZAD.
Transaction SA17 technical data table
|Purpose||Index pools for duplicate check|