A new job to clean up search indexes is available from 7.10.27.0, see Job - Cleanup Search Indexes. The cleanup of Solr indexes requires a Solr adapter version of 2.3.0, see Public Release Note - SolrCloud Search Service Adapter 2.
Furthermore, two new process chains are available: Job - ProcessChain.InitIndexesProductAssignments and Job - ProcessChain.RebuildIndexesProductAssignments.
These process chains combine the new job "Cleanup Search Indexes" and the existing jobs Rebuild Search Indexes and Update Product Assignments into a more convenient way to invoke these jobs in sequence.Run dbmigrate for adding the job configurations to the SLDSystem schedules.