the parameter name and the comment should be changed. A better name could be: consumer.softcommit = true or, index.NRT = true to highlight the Near Real Time behavior
The meaning of the parameter is allow the user to enable a soft commit for the indexer consumer. Nothing should change in the solr implementation or batch indexing. The default should be true (soft commit) but please change also the autocommit section in solrconfig for the search and oai cores so to have an automatic hardcommit every 10 minutes (600000)