is it possible to consolidate filterquery cache strings

[solr-user]

lets say I have a largish set of data (120M docs) and that I am partitioning
my data by groups of states (using the state codes)

Someone suggested that I could use the following format in my solrconfig.xml
when defining the filterqueries work:

    <listener event="newSearcher" class="solr.QuerySenderListener">
      <arr name="queries">
        <lst>
          <str name="q">*:*</str>
          <str name="fq">State:AL</str>
          <str name="fq">State:AK</str>
...
          <str name="fq">State:WY</str>
      </arr>
    </listener>

Would that work, and if so how would I know that the cache is being hit?

Or do I need to use the following traditional syntax instead:

    <listener event="newSearcher" class="solr.QuerySenderListener">
      <arr name="queries">
        <lst>
          <str name="q">*:*</str>
          <str name="fq">State:AL</str>
        </str>
        <lst>
          <str name="q">*:*</str>
          <str name="fq">State:AK</str>
        </str>
...
        <lst>
          <str name="q">*:*</str>
          <str name="fq">State:WY</str>
        </str>
      </arr>
    </listener>

any help appreciated



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