solrcofig.xml - need some info

[Ismail Siddiqui]

I am pretty new to solr. I was wondering what is this "mm" attribute in
requestHandler in solrconfig.xml and how it works. Tried to search wiki
could not find it



<str name="mm">
        2&lt;-1 5&lt;-2 6&lt;90%
</str>


thanks


Ismail