<!--$Id: memp_trickle.so,v 10.36 2004/08/13 03:38:58 bostic Exp $--> <!--Copyright (c) 1997,2007 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DB_ENV->memp_trickle</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>DB_ENV->memp_trickle</h3> </td> <td align=right> <a href="../../db46-devel-4.6.21/api_c/api_core.html"><img src="../../db46-devel-4.6.21/images/api.gif" alt="API"></a> <a href="../../db46-devel-4.6.21/ref/toc.html"><img src="../../db46-devel-4.6.21/images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <h3><pre> #include <db.h> <p> int DB_ENV->memp_trickle(DB_ENV *env, int percent, int *nwrotep); </pre></h3> <hr size=1 noshade> <h3>Description: DB_ENV->memp_trickle</h3> <p>The DB_ENV->memp_trickle method ensures that a specified percent of the pages in the shared memory pool are clean, by writing dirty pages to their backing files.</p> <p>The purpose of the DB_ENV->memp_trickle function is to enable a memory pool manager to ensure that a page is always available for reading in new information without having to wait for a write.</p> <p>The DB_ENV->memp_trickle method returns a non-zero error value on failure and 0 on success. </p> <h3>Parameters</h3> <dl compact> <dt><b>nwrotep</b><dd>The <b>nwrotep</b> parameter references memory into which the number of pages written to reach the specified percentage is copied. <dt><b>percent</b><dd>The <b>percent</b> parameter is the percent of the pages in the cache that should be clean. </dl> <h3>Errors</h3> <p>The DB_ENV->memp_trickle method may fail and 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>Class</h3> <a href="../../db46-devel-4.6.21/api_c/env_class.html">DB_ENV</a>, <a href="../../db46-devel-4.6.21/api_c/mempfile_class.html">DB_MPOOLFILE</a> <h3>See Also</h3> <a href="../../db46-devel-4.6.21/api_c/memp_list.html">Memory Pools and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db46-devel-4.6.21/api_c/api_core.html"><img src="../../db46-devel-4.6.21/images/api.gif" alt="API"></a><a href="../../db46-devel-4.6.21/ref/toc.html"><img src="../../db46-devel-4.6.21/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2007 Oracle. All rights reserved.</font> </body> </html>
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