env_set_lg_regionmax.html [plain text]
<!--$Id: env_set_lg_regionmax.html,v 1.1 2003/02/15 04:55:51 zarzycki Exp $-->
<!--Copyright 1997-2002 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<!--See the file LICENSE for redistribution information.-->
<html>
<head>
<title>Berkeley DB: DbEnv.set_lg_regionmax</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
</head>
<body bgcolor=white>
<a name="2"><!--meow--></a>
<table width="100%"><tr valign=top>
<td>
<h1>DbEnv.set_lg_regionmax</h1>
</td>
<td align=right>
<a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a>
</td></tr></table>
<hr size=1 noshade>
<tt>
<h3><pre>
import com.sleepycat.db.*;
<p>
public void set_lg_regionmax(int lg_regionmax)
throws DbException;
</pre></h3>
<h1>Description</h1>
<p>Set the size of the underlying logging subsystem region, in bytes. By
default, or if the value is set to 0, the base region size is 60KB.
The log region is used to store filenames, and so may need to be
increased in size if a large number of files will be opened and
registered with the specified Berkeley DB environment's log manager.
<p>The DbEnv.set_lg_regionmax method configures a database environment, not only operations
performed using the specified <a href="../api_java/env_class.html">DbEnv</a> handle.
<p>The DbEnv.set_lg_regionmax interface may not be called after the <a href="../api_java/env_open.html">DbEnv.open</a>
interface is called.
If the database environment already exists when
<a href="../api_java/env_open.html">DbEnv.open</a> is called, the information specified to DbEnv.set_lg_regionmax
will be ignored.
<p>The DbEnv.set_lg_regionmax method throws an exception that encapsulates a non-zero error value on
failure.
<p>The database environment's log region size may also be set using the environment's
<b>DB_CONFIG</b> file. The syntax of the entry in that file is a
single line with the string "set_lg_regionmax", one or more whitespace characters,
and the size in bytes. Because the <b>DB_CONFIG</b> file is read when the database
environment is opened, it will silently overrule configuration done
before that time.
<h1>Errors</h1>
<p>The DbEnv.set_lg_regionmax method may fail and throw an exception encapsulating a non-zero error for the following conditions:
<p><dl compact>
<p><dt>EINVAL<dd>An invalid flag value or parameter was specified.
<p>Called after <a href="../api_java/env_open.html">DbEnv.open</a> was called.
</dl>
<p>The DbEnv.set_lg_regionmax method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv.set_lg_regionmax method may fail and
throw a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>,
in which case all subsequent Berkeley DB calls will fail in the same way.
<h1>Class</h1>
<a href="../api_java/env_class.html">DbEnv</a>, <a href="../api_java/logc_class.html">DbLogc</a>, <a href="../api_java/lsn_class.html">DbLsn</a>
<h1>See Also</h1>
<a href="../api_java/log_list.html">Logging Subsystem and Related Methods</a>
</tt>
<table width="100%"><tr><td><br></td><td align=right>
<a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a>
</td></tr></table>
<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
</body>
</html>