Why solr keywordtokenizerfactory field query response is taking so long

I have made the type definition in Solr \conf\managed-schema like below. My core is very huge i.e. ~30 million documents, ~20 GB of data/indexed size, ~12 fields, and JVM memory allocation is -Xms10g, -Xmx10g

<field name="Address" type="text_keyword" default="" multiValued="false" indexed="true" stored="true"/>
<fieldType name="text_keyword" class="solr.TextField" positionIncrementGap="100" multiValued="true">
  <analyzer type="index">
    <tokenizer class="solr.KeywordTokenizerFactory"/>
    <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />        
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.KeywordTokenizerFactory"/>
    <filter class="solr.StopFilterFactory" ignoreCase="true" words="stopwords.txt" />
    <filter class="solr.SynonymGraphFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

And a /update request handler at conf\solrconfig.xml,

<requestHandler name="/update" class="solr.UpdateRequestHandler" >
<lst name="defaults">
  <str name="update.chain">dedupe</str>
</lst>

in conf\solrconfig.xml

<updateRequestProcessorChain name="dedupe">
   <processor class="solr.processor.SignatureUpdateProcessorFactory">
     <bool name="enabled">true</bool>
     <str name="signatureField">id</str>
     <str name="fields">Address,Field1,Field2,Field3,Field4,Field5,Field6,Field7,Field8,Field9,Field10,Field10</str>
     <str name="signatureClass">solr.processor.Lookup3Signature</str>
   </processor>
   <processor class="solr.LogUpdateProcessorFactory" />
   <processor class="solr.RunUpdateProcessorFactory" />
 </updateRequestProcessorChain>

Here is my search field query example:

http://localhost:8983/solr/mycore/select?indent=true&q.op=OR&q=*:*&fq=((Address:(*premier*)) OR (Field1:(*premier*)) OR (Field2:(*premier*)) OR (Field3:(*premier*)) OR (Field4:(*premier*)) OR (Field5:(*premier*)) OR (Field6:(*premier*)) OR (Field7:(*premier*)) OR (Field8:(*premier*)) OR (Field9:(*premier*)) OR (Field10:(*premier*)) OR (Field11:(*premier*))) 
AND ((Address:(*1\:34*)) OR (Field1:(*1\:34*)) OR (Field2:(*1\:34*)) OR (Field3:(*1\:34*)) OR (Field4:(*1\:34*)) OR (Field5:(*1\:34*)) OR (Field6:(*1\:34*)) OR (Field7:(*1\:34*)) OR (Field8:(*1\:34*)) OR (Field9:(*1\:34*)) OR (Field10:(*1\:34*)) OR (Field11:(*1\:34*)))
&rows=10&start=0&wt=json

The special characters are escaped with \ and I am trying filter the records like LIKE clause in RDBMS. The above query is working fine but the response is taking so long. What can I do to speed it up?