Query performance very slow even after autowarming

[johnnyisrael]

Hi,

I am using edgeNgramFilterfactory on SOLR 1.4.1 [<filter
class="solr.EdgeNGramFilterFactory" maxGramSize="100" minGramSize="1" />]
for my indexing.

Each document will have about 5 fields in it and only one field is indexed
with EdgeNGramFilterFactory.

I have about 1.4 million documents in my index now and my index size is
approx 296MB.

I made the field that is indexed with EdgeNGramFilterFactory as default
search field. All my query responses are very slow, some of them taking more
than 10seconds to respond. 

All my query responses are very slow, Queries with single letters are still
very slow.

/select/?q=m

So I tried query warming as follows.

<listener event="newSearcher" class="solr.QuerySenderListener">
      <arr name="queries">
        <lst><str name="q">a</str></lst>
        <lst><str name="q">b</str></lst>
        <lst><str name="q">c</str></lst>
        <lst><str name="q">d</str></lst>
        <lst><str name="q">e</str></lst>
        <lst><str name="q">f</str></lst>
        <lst><str name="q">g</str></lst>
        <lst><str name="q">h</str></lst>
        <lst><str name="q">i</str></lst>
        <lst><str name="q">j</str></lst>
        <lst><str name="q">k</str></lst>
        <lst><str name="q">l</str></lst>
        <lst><str name="q">m</str></lst>
        <lst><str name="q">n</str></lst>
        <lst><str name="q">o</str></lst>
        <lst><str name="q">p</str></lst>
        <lst><str name="q">q</str></lst>
        <lst><str name="q">r</str></lst>
        <lst><str name="q">s</str></lst>
        <lst><str name="q">t</str></lst>
        <lst><str name="q">u</str></lst>
        <lst><str name="q">v</str></lst>
        <lst><str name="q">w</str></lst>
        <lst><str name="q">x</str></lst>
        <lst><str name="q">y</str></lst>
        <lst><str name="q">z</str></lst>
      </arr>
</listener>

The same above is done for firstSearcher as well.

My cache settings are as follows.

<filterCache
      class="solr.LRUCache"
      size="16384"
      initialSize="4096"
autowarmCount="4096"/>

<queryResultCache
      class="solr.LRUCache"
      size="16384"
      initialSize="4096"
autowarmCount="1024"/>

<documentCache
      class="solr.LRUCache"
      size="16384"
      initialSize="16384"
/>

Still after query warming, few single character search is taking up to 3
seconds to respond.

Am i doing anything wrong in my cache setting or autowarm setting or am i
missing anything here?

Thanks,

Johnny
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