: I'm testing this on Windows, so that maybe a factor too (the OS is not : releasing file handles?!)
specifically: Windows won't let Solr delete files on disk that have open file handles... https://wiki.apache.org/solr/FAQ#Why_doesn.27t_my_index_directory_get_smaller_.28immediately.29_when_i_delete_documents.3F_force_a_merge.3F_optimize.3F -Hoss http://www.lucidworks.com/
