Reindex search after 9->10 upgrade

I'm trying to recreate my search index. I followed the info at but there's no change in the index (for example, it's still a 1KB file, and obvious results aren't returned; and from the Solr web console, the query tool returns 0 documents for *).

Is there a better/different way? I checked the Jobs service for errors and there are none, and no errors in the Solr logs, either.