I recently installed Solr 6.4 and configured it to work with Full import of index using DataImportHandler as the data's were stored at SQL server.
Now I want to do delta import for the new/updated records to be index to solr. But unfortunately this functionality is not working through my Solr Admin, But the new/updated data's are getting indexed automatically. When I verified the logs, I could see that the below warning messages are occurring recursively. "2018-12-19 16:13:21.927 WARN (qtp736709391-15) [ x:solrprod] o.a.s.u.DirectUpdateHandler2 Starting optimize... Reading and rewriting the entire index! Use with care." Kindly help and suggest whether rewriting the entire index is an issue or not and let me know whether it can impact my server or search. Thanks, Talha