<!--$Id: memp_openfd.so,v 10.3 2005/03/08 14:36:15 bostic Exp $--> <!--Copyright (c) 1997,2007 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DbEnv::set_mp_max_openfd</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td> <h3>DbEnv::set_mp_max_openfd</h3> </td> <td align=right> <a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a> <a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <h3><pre> #include <db_cxx.h> <p> int DbEnv::set_mp_max_openfd(int maxopenfd); <p> int DbEnv::get_mp_max_openfd(int *maxopenfdp); </pre></h3> <hr size=1 noshade> <h3>Description: DbEnv::set_mp_max_openfd</h3> <p>The DbEnv::set_mp_max_openfd method limits the number of file descriptors the library will open concurrently when flushing dirty pages from the cache.</p> <p>The DbEnv::set_mp_max_openfd method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. </p> <h3>Parameters</h3> <dl compact> <dt><b>maxopenfd</b><dd>The maximum number of file descriptors that may be concurrently opened by the library when flushing dirty pages from the cache. </dl> <h3>Errors</h3> <p>The DbEnv::set_mp_max_openfd method may fail and throw <a href="../api_cxx/except_class.html">DbException</a>, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:</p> <dl compact> <dt>EINVAL<dd>An invalid flag value or parameter was specified. </dl> <hr size=1 noshade> <h3>Description: DbEnv::get_mp_max_openfd</h3> <p>The DbEnv::get_mp_max_openfd method returns the maximum number of file descriptors open.</p> <p>The DbEnv::get_mp_max_openfd method may be called at any time during the life of the application.</p> <p>The DbEnv::get_mp_max_openfd method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success. </p> <h3>Parameters</h3> <dl compact> <dt><b>maxopenfdp</b><dd>The DbEnv::get_mp_max_openfd method returns the maximum number of file descriptors open in <b>maxopenfdp</b>. </dl> <hr size=1 noshade> <h3>Class</h3> <a href="../api_cxx/env_class.html">DbEnv</a>, <a href="../api_cxx/mempfile_class.html">DbMpoolFile</a> <h3>See Also</h3> <a href="../api_cxx/memp_list.html">Memory Pools and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2007 Oracle. All rights reserved.</font> </body> </html>