To index all drupal items in your search index -- solr -- searchstax

clear the index

drush search-api:reset-tracker freida

nohup drush search-api:index freida --batch-size=100 > /mnt/tmp/reindex.log 2>&1 &

or just

 drush search-api:clear freida && nohup drush search-api:index freida --batch-size=100 

where freida is your index name, freida is mine obv.