On 27-Jul-07, at 11:23 AM, Jae Joo wrote:

does anyone know what exactly is?
<mergeFactor>10</mergeFactor>
    <maxBufferedDocs>10000</maxBufferedDocs>
    <maxMergeDocs>2147483647</maxMergeDocs>
    <writeLockTimeout>1000</writeLockTimeout>
    <commitLockTimeout>10000</commitLockTimeout>

Most of these are lucene index creation settings, see
http://lucene.zones.apache.org:8080/hudson/job/Lucene-Nightly/javadoc/ index.html

The settings are mostly moot after indexing is done, especially if an <optimize/> is done.

If we change the value, do I have to reindex it?

    <maxFieldLength>10000</maxFieldLength>

This is the only setting that affects search, and it is the maximum length of searchable documents. You will have to reindex to see the changes here.

-Mike

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