Solr - SystemOutOfMemory exception

[Pandiya]

I am trying to add 11 million records through SOLR. But am getting System.OutOfMemory exception.

I am doing in chunk of 2000 records. For 12000 records its taking 10 minutes to commit and finally getting the above exception.

splitSolrList - Collection another list contains 2000 records.

Parallel.ForEach(splitSolrList, solrList =>

                        {

                            var solr = ServiceLocator.Current.GetInstance<ISolrOperations<SolrProduct>>();

                            solr.AddRange(solrList);

                            solr.Commit();

                        });

How to resolve this?