solr 4.3, autocommit, maxdocs

[Jonathan Rochkind]

I have a solr 4.3 instance I am in the process of standing up. It 
started out with an empty index.

I have in it's solrconfig.xml,
  <updateHandler class="solr.DirectUpdateHandler2">
    <autoCommit>
      <maxDocs>100000</maxDocs>
      <openSearcher>false</openSearcher>
    </autoCommit>
  <updateHandler>

I have an index process running, that has currently added around 400k 
documents to Solr.

I had expected that a 'commit' would be run every 100k documents, from 
the above configuration, so 4 commits would have been run by now, and 
I'd see documents in the index.

However, when I look in the Solr admin interface, at my core's 
'overview' page, it still says num docs 0, segment count 0.  When I 
expected num docs 400k at this point.

Is there something I'm misunderstanding about the configuration or the 
admin interface? Or am I right in my expectations, but something else 
must be going wrong?

Thanks for any advice,

Jonathan