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<!--$Id: memp_trickle.so,v 10.36 2004/08/13 03:38:58 bostic Exp $--> <!--Copyright (c) 1997,2008 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> <b>DB_ENV->memp_trickle</b> </td> <td align=right> <a href="../../db4-devel-4.7.25/api_c/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a> <a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <b><pre> #include <db.h> <p> int DB_ENV->memp_trickle(DB_ENV *env, int percent, int *nwrotep); </pre></b> <hr size=1 noshade> <b>Description: DB_ENV->memp_trickle</b> <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> <b>Parameters</b> <br> <b>nwrotep</b><ul compact><li>The <b>nwrotep</b> parameter references memory into which the number of pages written to reach the specified percentage is copied.</ul> <b>percent</b><ul compact><li>The <b>percent</b> parameter is the percent of the pages in the cache that should be clean.</ul> <br> <br><b>Errors</b> <p>The DB_ENV->memp_trickle method may fail and return one of the following non-zero errors:</p> <br> <b>EINVAL</b><ul compact><li>An invalid flag value or parameter was specified.</ul> <br> <hr size=1 noshade> <br><b>Class</b> <a href="../../db4-devel-4.7.25/api_c/env_class.html">DB_ENV</a>, <a href="../../db4-devel-4.7.25/api_c/mempfile_class.html">DB_MPOOLFILE</a> <br><b>See Also</b> <a href="../../db4-devel-4.7.25/api_c/memp_list.html">Memory Pools and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.7.25/api_c/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a><a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>
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