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diff --git a/bdb/docs/ref/mp/intro.html b/bdb/docs/ref/mp/intro.html deleted file mode 100644 index 2b52a5775ce..00000000000 --- a/bdb/docs/ref/mp/intro.html +++ /dev/null @@ -1,59 +0,0 @@ -<!--$Id: intro.so,v 10.15 2001/01/18 20:31:37 bostic Exp $--> -<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> -<!--All rights reserved.--> -<html> -<head> -<title>Berkeley DB Reference Guide: Berkeley DB and the memory pool</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> -<table><tr valign=top> -<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Memory Pool Subsystem</dl></h3></td> -<td width="1%"><a href="../../ref/log/limits.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/mp/config.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p> -<h1 align=center>Berkeley DB and the memory pool</h1> -<p>The memory pool subsystem is the general-purpose shared memory buffer pool -used by Berkeley DB. This module is useful outside of the Berkeley DB package for -processes that require page-oriented, cached, shared file access. -<p>A memory pool is a shared memory cache shared by any number of processes -and threads within processes. The <a href="../../api_c/env_open.html">DBENV->open</a> interface opens, and -optionally creates, a memory pool. When that pool is no longer in use, -it should be closed, using the <a href="../../api_c/env_close.html">DBENV->close</a> interface. -<p>The <a href="../../api_c/memp_fopen.html">memp_fopen</a> interface opens an underlying file within the -memory pool. When that file is no longer in use, it should be closed, -using the <a href="../../api_c/memp_fclose.html">memp_fclose</a> interface. The <a href="../../api_c/memp_fget.html">memp_fget</a> interface -is used to retrieve pages from files in the pool. All retrieved pages -must be subsequently returned using the <a href="../../api_c/memp_fput.html">memp_fput</a> interface. At -the time that pages are returned, they may be marked <b>dirty</b>, which -causes them to be written to the backing disk file before being discarded -from the pool. If there is insufficient room to bring a new page in the -pool, a page is selected to be discarded from the pool. If that page is -dirty, it is first written to the backing file. The page is selected -using a somewhat modified least-recently-used algorithm. Pages in files -may also be explicitly marked clean or dirty using the <a href="../../api_c/memp_fset.html">memp_fset</a> -interface. All dirty pages in the pool from any underlying file may also -be flushed as a group using the <a href="../../api_c/memp_fsync.html">memp_fsync</a> interface. -<p>There are additional interfaces for manipulating the entire memory pool: -<ul type=disc> -<li>It is possible to gradually flush buffers from the pool in order to -maintain a consistent percentage of clean buffers in the pool using the -<a href="../../api_c/memp_trickle.html">memp_trickle</a> interface. -<li>The <a href="../../utility/db_stat.html">db_stat</a> utility uses the <a href="../../api_c/memp_stat.html">memp_stat</a> interface to -display statistics about the efficiency of the pool. -<li>As some conversion may be necessary when pages are read or written the -<a href="../../api_c/memp_register.html">memp_register</a> function allows applications to specify automatic -input and output processing in these cases. -<li>There is one additional interface that is intended for manipulating the -memory pool, but which is specific to database systems. The -<a href="../../api_c/memp_sync.html">memp_sync</a> interface flushes dirty pages from all files held in -the pool up to a specified database log sequence number. -<li>Finally, the entire pool may be discarded using the <a href="../../api_c/env_remove.html">DBENV->remove</a> -interface. -</ul> -<table><tr><td><br></td><td width="1%"><a href="../../ref/log/limits.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/mp/config.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> -</body> -</html> |