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+<!DOCTYPE html>
+<html><head>
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<link href="../sqlite.css" rel="stylesheet">
+<title>Enable Or Disable Shared Pager Cache</title>
+<!-- path=../ -->
+</head>
+<body>
+<div class=nosearch>
+<a href="../index.html">
+<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
+</a>
+<div><!-- IE hack to prevent disappearing logo --></div>
+<div class="tagline desktoponly">
+Small. Fast. Reliable.<br>Choose any three.
+</div>
+<div class="menu mainmenu">
+<ul>
+<li><a href="../index.html">Home</a>
+<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
+<li class='wideonly'><a href='../about.html'>About</a>
+<li class='desktoponly'><a href="../docs.html">Documentation</a>
+<li class='desktoponly'><a href="../download.html">Download</a>
+<li class='wideonly'><a href='../copyright.html'>License</a>
+<li class='desktoponly'><a href="../support.html">Support</a>
+<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
+<li class='search' id='search_menubutton'>
+<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
+</ul>
+</div>
+<div class="menu submenu" id="submenu">
+<ul>
+<li><a href='../about.html'>About</a>
+<li><a href='../docs.html'>Documentation</a>
+<li><a href='../download.html'>Download</a>
+<li><a href='../support.html'>Support</a>
+<li><a href='../prosupport.html'>Purchase</a>
+</ul>
+</div>
+<div class="searchmenu" id="searchmenu">
+<form method="GET" action="../search">
+<select name="s" id="searchtype">
+<option value="d">Search Documentation</option>
+<option value="c">Search Changelog</option>
+</select>
+<input type="text" name="q" id="searchbox" value="">
+<input type="submit" value="Go">
+</form>
+</div>
+</div>
+<script>
+function toggle_div(nm) {
+var w = document.getElementById(nm);
+if( w.style.display=="block" ){
+w.style.display = "none";
+}else{
+w.style.display = "block";
+}
+}
+function toggle_search() {
+var w = document.getElementById("searchmenu");
+if( w.style.display=="block" ){
+w.style.display = "none";
+} else {
+w.style.display = "block";
+setTimeout(function(){
+document.getElementById("searchbox").focus()
+}, 30);
+}
+}
+function div_off(nm){document.getElementById(nm).style.display="none";}
+window.onbeforeunload = function(e){div_off("submenu");}
+/* Disable the Search feature if we are not operating from CGI, since */
+/* Search is accomplished using CGI and will not work without it. */
+if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
+document.getElementById("search_menubutton").style.display = "none";
+}
+/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
+function hideorshow(btn,obj){
+var x = document.getElementById(obj);
+var b = document.getElementById(btn);
+if( x.style.display!='none' ){
+x.style.display = 'none';
+b.innerHTML='show';
+}else{
+x.style.display = '';
+b.innerHTML='hide';
+}
+return false;
+}
+var antiRobot = 0;
+function antiRobotGo(){
+if( antiRobot!=3 ) return;
+antiRobot = 7;
+var j = document.getElementById("mtimelink");
+if(j && j.hasAttribute("data-href")) j.href=j.getAttribute("data-href");
+}
+function antiRobotDefense(){
+document.body.onmousedown=function(){
+antiRobot |= 2;
+antiRobotGo();
+document.body.onmousedown=null;
+}
+document.body.onmousemove=function(){
+antiRobot |= 2;
+antiRobotGo();
+document.body.onmousemove=null;
+}
+setTimeout(function(){
+antiRobot |= 1;
+antiRobotGo();
+}, 100)
+antiRobotGo();
+}
+antiRobotDefense();
+</script>
+<!-- keywords: sqlite3_enable_shared_cache -->
+<div class=nosearch>
+<a href="../c3ref/intro.html"><h2>SQLite C Interface</h2></a>
+<h2>Enable Or Disable Shared Pager Cache</h2>
+</div>
+<blockquote><pre>
+int sqlite3_enable_shared_cache(int);
+</pre></blockquote>
+<p>
+This routine enables or disables the sharing of the database cache
+and schema data structures between <a href="../c3ref/sqlite3.html">connections</a>
+to the same database. Sharing is enabled if the argument is true
+and disabled if the argument is false.</p>
+
+<p>This interface is omitted if SQLite is compiled with
+<a href="../compile.html#omit_shared_cache">-DSQLITE_OMIT_SHARED_CACHE</a>.  The <a href="../compile.html#omit_shared_cache">-DSQLITE_OMIT_SHARED_CACHE</a>
+compile-time option is recommended because the
+<a href="../sharedcache.html#dontuse">use of shared cache mode is discouraged</a>.</p>
+
+<p>Cache sharing is enabled and disabled for an entire process.
+This is a change as of SQLite <a href="../releaselog/3_5_0.html">version 3.5.0</a> (2007-09-04).
+In prior versions of SQLite,
+sharing was enabled or disabled for each thread separately.</p>
+
+<p>The cache sharing mode set by this interface effects all subsequent
+calls to <a href="../c3ref/open.html">sqlite3_open()</a>, <a href="../c3ref/open.html">sqlite3_open_v2()</a>, and <a href="../c3ref/open.html">sqlite3_open16()</a>.
+Existing database connections continue to use the sharing mode
+that was in effect at the time they were opened.</p>
+
+<p>This routine returns <a href="../rescode.html#ok">SQLITE_OK</a> if shared cache was enabled or disabled
+successfully.  An <a href="../rescode.html">error code</a> is returned otherwise.</p>
+
+<p>Shared cache is disabled by default. It is recommended that it stay
+that way.  In other words, do not use this routine.  This interface
+continues to be provided for historical compatibility, but its use is
+discouraged.  Any use of shared cache is discouraged.  If shared cache
+must be used, it is recommended that shared cache only be enabled for
+individual database connections using the <a href="../c3ref/open.html">sqlite3_open_v2()</a> interface
+with the <a href="../c3ref/c_open_autoproxy.html">SQLITE_OPEN_SHAREDCACHE</a> flag.</p>
+
+<p>Note: This method is disabled on MacOS X 10.7 and iOS version 5.0
+and will always return SQLITE_MISUSE. On those systems,
+shared cache mode should be enabled per-database connection via
+<a href="../c3ref/open.html">sqlite3_open_v2()</a> with <a href="../c3ref/c_open_autoproxy.html">SQLITE_OPEN_SHAREDCACHE</a>.</p>
+
+<p>This interface is threadsafe on processors where writing a
+32-bit integer is atomic.</p>
+
+<p>See Also:  <a href="../sharedcache.html">SQLite Shared-Cache Mode</a>
+</p><p>See also lists of
+  <a href="../c3ref/objlist.html">Objects</a>,
+  <a href="../c3ref/constlist.html">Constants</a>, and
+  <a href="../c3ref/funclist.html">Functions</a>.</p>
+