Query performance

[Charles Wardell]

Hi All,

I have an index with about 30M documents. For the most part queries are very 
fast. However, when I add a wildcard to a search field.
+title:h*twitter it can take a few minutes. 


8GB
1 quad core
CENTOS

    <useCompoundFile>false</useCompoundFile>
    <mergeFactor>100</mergeFactor>
    <ramBufferSizeMB>512</ramBufferSizeMB>
    <maxBufferedDocs>100000</maxBufferedDocs>

    <maxFieldLength>10000</maxFieldLength>
    <writeLockTimeout>1000</writeLockTimeout>
    <commitLockTimeout>10000</commitLockTimeout>


    <lockType>native</lockType>
      <autoCommit> 
         <maxDocs>100000</maxDocs>
         <maxTime>90000</maxTime> 
       </autoCommit>