Do I need to declare TermVectorComponent for best MoreLikeThis results?

[Max Bridgewater]

Hi,

The MLT documentation says that for best results, the fields should have
stored term vectors in schema.xml, with:

<field name="cat" ... termVectors="true" />

My question: should I also create the TermVectorComponent and declare it in
the search handler?

In other terms, do I have to do this in my solrconfig.xml for best results?

<searchComponent name="tvComponent"
class="org.apache.solr.handler.component.TermVectorComponent"/>

<requestHandler name="/tvrh" class=
"org.apache.solr.handler.component.SearchHandler">
  <lst name="defaults">
    <bool name="tv">true</bool>
  </lst>
  <arr name="last-components">
    <str>tvComponent</str>
  </arr>
</requestHandler>


I am seeing continuously increasing MLT response times and I am wondering
if I am doing something wrong.

Thanks.
Max.