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<document>
<properties>
<author email="otis @ apache dot org">Otis Gospodnetić</author>
<title>Jakarta Lucene - System Properties</title>
</properties>
<body>
<section name="About this Document">
<p>
Lucene has a number of properties that can be tuned. They can be adjusted
either programmatically, using the Lucene API, or their default values can be
set via system properties described in this document.
</p>
</section>
<section name="System Properties">
<p>
<table width="100%" border="0" cellpadding="4" cellspacing="0">
<tr valign="top">
<td width="25%"><b>Lucene Property</b></td>
<td width="25%"><b>System Property</b></td>
<td width="25%"><b>Default Value</b></td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#mergeFactor">mergeFactor</a>
</td>
<td width="25%">
org.apache.lucene.mergeFactor
</td>
<td width="25%">
10
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#minMergeDocs">minMergeDocs</a>
</td>
<td width="25%">
org.apache.lucene.minMergeDocs
</td>
<td width="25%">
10
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#maxMergeDocs">maxMergeDocs</a>
</td>
<td width="25%">
org.apache.lucene.maxMergeDocs
</td>
<td width="25%">
Integer.MAX_VALUE
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#maxFieldLength">maxFieldLength</a>
</td>
<td width="25%">
org.apache.lucene.maxFieldLength
</td>
<td width="25%">
10000
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#COMMIT_LOCK_TIMEOUT">COMMIT_LOCK_TIMEOUT</a>
</td>
<td width="25%">
org.apache.lucene.commitLockTimeout
</td>
<td width="25%">
10000 ms
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/IndexWriter.html#WRITE_LOCK_TIMEOUT">WRITE_LOCK_TIMEOUT</a>
</td>
<td width="25%">
org.apache.lucene.writeLockTimeout
</td>
<td width="25%">
1000 ms
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/search/BooleanQuery.html#maxClauseCount">maxClauseCount</a>
</td>
<td width="25%">
org.apache.lucene.maxClauseCount
</td>
<td width="25%">
1024
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/store/FSDirectory.html#lockDir">lockDir</a>
</td>
<td width="25%">
org.apache.lucene.lockDir
</td>
<td width="25%">
the value of <code>java.io.tmpdir</code> system property
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/store/FSDirectory.html#FSDirectory.class">FSDirectory.class</a>
</td>
<td width="25%">
org.apache.lucene.FSDirectory.class
</td>
<td width="25%">
org.apache.lucene.store.FSDirectory
</td>
</tr>
<tr valign="TOP">
<td width="25%">
<a href="api/org/apache/lucene/index/SegmentReader.html#SegmentReader.class">SegmentReader.class</a>
</td>
<td width="25%">
org.apache.lucene.index.SegmentReader.class
</td>
<td width="25%">
org.apache.lucene.index.SegmentReader
</td>
</tr>
</table>
</p>
</section>
</body>
</document>