Dismax - Boosting

[Solr User]

Hi,

Currently we are using StandardRequestHandler and the configuration in
SolrConfig.xml is as below:

  <requestHandler name="standard" class="solr.SearchHandler" default="true">
    <!-- default values for query parameters -->
     <lst name="defaults">
       <str name="echoParams">explicit</str>
       <!--
       <int name="rows">10</int>
       <str name="fl">*</str>
       <str name="version">2.1</str>
        -->
     </lst>
  </requestHandler>


We would like to switch to DisMax request handler and the configuration in
SolrConfig.xml is:

  <requestHandler name="dismax" class="solr.SearchHandler" >
    <lst name="defaults">
     <str name="defType">dismax</str>
     <str name="echoParams">explicit</str>
     <float name="tie">0.01</float>
     <str name="qf">
        text^0.5 features^1.0 name^1.2 sku^1.5 id^10.0 manu^1.1 cat^1.4
     </str>
     <str name="pf">
        text^0.2 features^1.1 name^1.5 manu^1.4 manu_exact^1.9
     </str>
     <str name="bf">
        popularity^0.5 recip(price,1,1000,1000)^0.3
     </str>
     <str name="fl">
        id,name,price,score
     </str>
     <str name="mm">
        2&lt;-1 5&lt;-2 6&lt;90%
     </str>
     <int name="ps">100</int>
     <str name="q.alt">*:*</str>
     <!-- example highlighter config, enable per-query with hl=true -->
     <str name="hl.fl">text features name</str>
     <!-- for this field, we want no fragmenting, just highlighting -->
     <str name="f.name.hl.fragsize">0</str>
     <!-- instructs Solr to return the field itself if no query terms are
          found -->
     <str name="f.name.hl.alternateField">name</str>
     <str name="f.text.hl.fragmenter">regex</str> <!-- defined below -->
    </lst>
  </requestHandler>

Questions:

1. Do we need to change the above DisMax handler configuration as per our
requirements? Or Leave it as it is? What changes?
2. Do we need make DisMax as a default request handler?  Do I need to add
attribute default="true" to the tag?
3. I read in the documentation that Default Search Handler and DisMax are
the same except that to use DisMaxQueryParser add defType=dismax in the
query string. Is there anything else do we need to do?

We are basically moving on to dismax handler and trying to understand what
changes we need to make to SolrConfig.xml. I understood what changes need to
be made to schema.xml in a different thread on this forum.

Thanks,
Solr User