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CompactConfig (Oracle - Berkeley DB Java API)
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<b>Berkeley DB</b><br><font size="-1"> version 4.7.25</font></EM>
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com.sleepycat.db</FONT>
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Class CompactConfig</H2>
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<PRE>
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<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
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<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.sleepycat.db.CompactConfig</B>
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<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Cloneable.html" title="class or interface in java.lang">Cloneable</A></DD>
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<DT><PRE>public class <B>CompactConfig</B><DT>extends <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A><DT>implements <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Cloneable.html" title="class or interface in java.lang">Cloneable</A></DL>
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</PRE>
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<P>
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Configuration for <A HREF="../../../com/sleepycat/db/Database.html#compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)"><CODE>Database.compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)</CODE></A> operations.
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<CODE>static <A HREF="../../../com/sleepycat/db/CompactConfig.html" title="class in com.sleepycat.db">CompactConfig</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#DEFAULT">DEFAULT</A></B></CODE>
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<BR>
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Default configuration used if null is passed to methods that create a
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cursor.</TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<B>Constructor Summary</B></FONT></TH>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#CompactConfig()">CompactConfig</A></B>()</CODE>
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<BR>
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Construct a default configuration object for compact operations.</TD>
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<!-- ========== METHOD SUMMARY =========== -->
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFillPercent()">getFillPercent</A></B>()</CODE>
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<BR>
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Return the the desired fill percentage.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFreeListOnly()">getFreeListOnly</A></B>()</CODE>
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<BR>
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Return true if the whether to skip page compaction.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFreeSpace()">getFreeSpace</A></B>()</CODE>
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<BR>
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Return true if the whether to return pages to the filesystem.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getMaxPages()">getMaxPages</A></B>()</CODE>
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<BR>
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Return the the maximum number of pages to free.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getTimeout()">getTimeout</A></B>()</CODE>
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<BR>
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Return the the lock timeout set for implicit transactions, in microseconds.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFillPercent(int)">setFillPercent</A></B>(int fillpercent)</CODE>
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<BR>
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Set the desired fill percentage.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFreeListOnly(boolean)">setFreeListOnly</A></B>(boolean freeListOnly)</CODE>
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<BR>
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Configure whether to skip page compaction, only returning pages
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to the filesystem that are already free and at the end of the file.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFreeSpace(boolean)">setFreeSpace</A></B>(boolean freeSpace)</CODE>
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<BR>
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Return pages to the filesystem if possible.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setMaxPages(int)">setMaxPages</A></B>(int maxPages)</CODE>
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<BR>
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Set the maximum number of pages to free.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setTimeout(int)">setTimeout</A></B>(int timeout)</CODE>
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<BR>
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Set the lock timeout for implicit transactions.</TD>
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</TR>
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</TABLE>
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<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TH>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<P>
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<!-- ============ FIELD DETAIL =========== -->
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<A NAME="field_detail"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<B>Field Detail</B></FONT></TH>
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</TABLE>
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<A NAME="DEFAULT"><!-- --></A><H3>
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DEFAULT</H3>
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<PRE>
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public static final <A HREF="../../../com/sleepycat/db/CompactConfig.html" title="class in com.sleepycat.db">CompactConfig</A> <B>DEFAULT</B></PRE>
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<DL>
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<DD>Default configuration used if null is passed to methods that create a
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cursor.
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<P>
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<DL>
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</DL>
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</DL>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="constructor_detail"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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<B>Constructor Detail</B></FONT></TH>
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</TR>
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</TABLE>
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<A NAME="CompactConfig()"><!-- --></A><H3>
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CompactConfig</H3>
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<PRE>
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public <B>CompactConfig</B>()</PRE>
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<DL>
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<DD>Construct a default configuration object for compact operations.
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<P>
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</DL>
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="method_detail"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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<B>Method Detail</B></FONT></TH>
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</TR>
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</TABLE>
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<A NAME="setFillPercent(int)"><!-- --></A><H3>
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setFillPercent</H3>
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<PRE>
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public void <B>setFillPercent</B>(int fillpercent)</PRE>
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<DL>
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<DD>Set the desired fill percentage.
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If non-zero, the goal for filling pages, specified as a percentage
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between 1 and 100. Any page in a Btree or Recno databases not at or
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above this percentage full will be considered for compaction. The
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default behavior is to consider every page for compaction, regardless
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of its page fill percentage.
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<P>
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<DD><DL>
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</DL>
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</DD>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>fillpercent</CODE> - The desired fill percentage.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getFillPercent()"><!-- --></A><H3>
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getFillPercent</H3>
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<PRE>
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public int <B>getFillPercent</B>()</PRE>
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<DL>
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<DD>Return the the desired fill percentage.
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<p>
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This method may be called at any time during the life of the application.
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<p>
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<P>
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<DD><DL>
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</DL>
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</DD>
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<DD><DL>
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<DT><B>Returns:</B><DD>The the desired fill percentage.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="setFreeListOnly(boolean)"><!-- --></A><H3>
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setFreeListOnly</H3>
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<PRE>
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public void <B>setFreeListOnly</B>(boolean freeListOnly)</PRE>
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<DL>
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<DD>Configure whether to skip page compaction, only returning pages
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to the filesystem that are already free and at the end of the file.
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This flag must be set if the database is a Hash access method database.
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<P>
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<DD><DL>
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</DL>
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</DD>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>freeListOnly</CODE> - Whether to skip page compaction</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getFreeListOnly()"><!-- --></A><H3>
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getFreeListOnly</H3>
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<PRE>
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public boolean <B>getFreeListOnly</B>()</PRE>
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<DL>
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<DD>Return true if the whether to skip page compaction.
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<p>
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This method may be called at any time during the life of the application.
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<p>
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<P>
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<DD><DL>
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</DL>
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</DD>
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<DD><DL>
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<DT><B>Returns:</B><DD>True if the whether to skip page compaction.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="setFreeSpace(boolean)"><!-- --></A><H3>
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setFreeSpace</H3>
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<PRE>
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public void <B>setFreeSpace</B>(boolean freeSpace)</PRE>
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<DL>
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<DD>Return pages to the filesystem if possible. If this flag is not
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specified, pages emptied as a result of compaction will be placed on the
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free list for re-use, but not returned to the filesystem.
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Note that only pages at the end of the file may be returned. Given the one
|
|
pass nature of the algorithm if a page near the end of the file is
|
|
logically near the begining of the btree it will inhibit returning pages to
|
|
the file system.
|
|
A second call to the method with a low fillfactor can be used to return
|
|
pages in such a situation.
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>freeSpace</CODE> - Whether to return pages to the filesystem</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getFreeSpace()"><!-- --></A><H3>
|
|
getFreeSpace</H3>
|
|
<PRE>
|
|
public boolean <B>getFreeSpace</B>()</PRE>
|
|
<DL>
|
|
<DD>Return true if the whether to return pages to the filesystem.
|
|
<p>
|
|
This method may be called at any time during the life of the application.
|
|
<p>
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
|
|
<DT><B>Returns:</B><DD>True if the whether to return pages to the filesystem.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="setMaxPages(int)"><!-- --></A><H3>
|
|
setMaxPages</H3>
|
|
<PRE>
|
|
public void <B>setMaxPages</B>(int maxPages)</PRE>
|
|
<DL>
|
|
<DD>Set the maximum number of pages to free.
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>maxPages</CODE> - If non-zero, the call will return after that number of pages have been
|
|
freed.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getMaxPages()"><!-- --></A><H3>
|
|
getMaxPages</H3>
|
|
<PRE>
|
|
public int <B>getMaxPages</B>()</PRE>
|
|
<DL>
|
|
<DD>Return the the maximum number of pages to free.
|
|
<p>
|
|
This method may be called at any time during the life of the application.
|
|
<p>
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
|
|
<DT><B>Returns:</B><DD>The the maximum number of pages to free.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="setTimeout(int)"><!-- --></A><H3>
|
|
setTimeout</H3>
|
|
<PRE>
|
|
public void <B>setTimeout</B>(int timeout)</PRE>
|
|
<DL>
|
|
<DD>Set the lock timeout for implicit transactions.
|
|
If non-zero, and no transaction parameter was specified to
|
|
<A HREF="../../../com/sleepycat/db/Database.html#compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)"><CODE>Database.compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)</CODE></A>, the lock timeout set for implicit
|
|
transactions, in microseconds.
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - the lock timeout set for implicit transactions, in microseconds.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getTimeout()"><!-- --></A><H3>
|
|
getTimeout</H3>
|
|
<PRE>
|
|
public int <B>getTimeout</B>()</PRE>
|
|
<DL>
|
|
<DD>Return the the lock timeout set for implicit transactions, in microseconds.
|
|
<p>
|
|
This method may be called at any time during the life of the application.
|
|
<p>
|
|
<P>
|
|
<DD><DL>
|
|
</DL>
|
|
</DD>
|
|
<DD><DL>
|
|
|
|
<DT><B>Returns:</B><DD>The the lock timeout set for implicit transactions, in microseconds.</DL>
|
|
</DD>
|
|
</DL>
|
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<b>Berkeley DB</b><br><font size="-1"> version 4.7.25</font></EM>
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