How do I increase the admin timeout?

	// SAVE SESSIONS IN DB TABLE: modx_sessoin
	@include_once "session_db.inc.php";

<?php
// FILE: session_db.inc.php

// This is the name for the session table.
$g_sessTable = "modx_sessions"; // for backward compatibility with etomite .6

// Retrieve the session maximum lifetime (found in php.ini)
// Or you can just set your desired session time here.
// For example, setting to 300 will give you 5 minutes (60*5).
$g_lifetime = ini_get("session.gc_maxlifetime");

// Hold reference to instance of class defined below.
$g_modxMysqlSession = null;


// Need access to DBAPI, but that can't be instantiated without an entire DocumentParser
//	object because of bug FS#393. For now just make $modx global (which will be re-created later)
//	during startup.
include_once $base_path.'/manager/includes/document.parser.class.inc.php';
// Use for DB access
$modx = new DocumentParser;

// Override MODX version of session starter with this better one.
// See bottom of config.inc.php. If this function (below) exists, it overrides that one.
function startCMSSession(){
	$g_modxMysqlSession = new ModxMysqlSession();
}


// This class implements the PHP API for Mysql sessions.
// Currently won't work with any other DB.
class ModxMysqlSession {



	// Constructor
	function ModxMysqlSession()
	{
		global $g_sessTable; // Name of session table, from this file.
		global $site_sessionname; // From config.inc.php

		// Create the session table, if we don't have one.
		if(!$this->tableExists($g_sessTable))
			{
		       $query = "CREATE TABLE $g_sessTable ( SID char(255) NOT NULL, expiration INT NOT NULL, value LONGTEXT NOT NULL, PRIMARY KEY(SID), INDEX ( expiration) );";
		       $result = $this->query($query);
		       if( !$result)
		       {
			   	die( "ERROR: Failed to create session table: $g_sessTable");
			   }
			}

		// Set the session name.
		session_name($site_sessionname);

		// Setup Mysql API for handling sessions.
		// THIS MUST BE DONE AFTER SESSION_NAME, OR YOU WILL GET FATAL ERROR ON LOGOUT.
	    ini_set('session.save_handler', 'user');
		session_set_save_handler(
			array(&$this, "open"),
			array(&$this, "close"),
		  	array(&$this, "read"),
		  	array(&$this, "write"),
		  	array(&$this, "destroy"),
		  	array(&$this, "garbage_collect") );

		// Works around bug in some newer PHP's.
		// See: http://fr.php.net/manual/en/function.session-set-save-handler.php#61223
		register_shutdown_function("session_write_close");

		// Start the session.
		session_start();
	}

   	// My special version of dbapi query function. Actually returns errors.
	// You can use the regular DBAPI function when FS#358 is fixed.
	function query($sql) {

		global $modx;
		if(empty($modx->db->conn)||!is_resource($modx->db->conn)) {
			$modx->db->connect();
		}
		$tstart = $modx->getMicroTime();
		if(!$result = @mysql_query($sql, $modx->db->conn)) {
			// Original printed a message here that caused problems.
			return $result;
		} else {
			$tend = $modx->getMicroTime();
			$totaltime = $tend-$tstart;
			$modx->queryTime = $modx->queryTime+$totaltime;
			if($modx->dumpSQL) {
				$modx->queryCode .= "<fieldset style='text-align:left'><legend>Query ".($this->executedQueries+1)." - ".sprintf("%2.4f s", $totaltime)."</legend>".$sql."</fieldset><br />";
			}
			$modx->executedQueries = $modx->executedQueries+1;
			return $result;
		}

	}

	// Check to see if Table exists in current DB.
	function tableExists($tableName)
	{

	   global $dbase;
	   $tables = array();
	   $dbase_without_ticks = str_replace( "`", "", $dbase);
	   $tablesResult = $this->query("SHOW TABLES in $dbase_without_ticks;");
	   while ($row = mysql_fetch_row($tablesResult))
	   {
	   	$tables[] = $row[0];
	   }
	   return(in_array($tableName, $tables));
	}


	// Cleanup any out of data sessions at startup.
	function open($session_path, $session_name) {
	  	global $g_lifetime;
 		global $site_sessionname; // From config.inc.php


	  // Cleanup any old sessions.
	  if( $session_name != $site_sessionname ) die( "Unexpected session name: $session_name");
	  return $this->garbage_collect( $g_lifetime);
	}


	// Doesn't actually do anything since the server connection is
	//    persistent. Keep in mind that although this function
	//    doesn't do anything in my particular implementation, I
	//    still must define it.
	function close() {

	  return( true);

	}


	// Reads the session data from the database
	function read($SID) {
	  global $g_sessTable;

	  $SID = mysql_escape_string($SID);

	  $query = "SELECT value FROM $g_sessTable WHERE SID = '$SID' AND expiration > ". time();

	  $result = $this->query($query);
	  if($result && (mysql_num_rows($result) == 1) )
	  {
	    $row = mysql_fetch_array($result);
	    return $row['value'];
	  }
	  else
	  {
	  	return( ''); // Must return "" here.
	  }

	}

	// This function writes the session data to the database. If that SID // already exists, then the existing data will be updated.
	function write($SID, $value) {
	  global $g_sessTable;
	  GLOBAL $g_lifetime;

	  $SID = mysql_escape_string($SID);
	  $value = mysql_escape_string( $value);

	  $expiration = time() + $g_lifetime;

	  $query = "INSERT INTO $g_sessTable VALUES('$SID', '$expiration', '$value')";

	  $result = $this->query($query);

	  if (!$result)
	  {

	   $query = "UPDATE $g_sessTable SET expiration = '$expiration', value = '$value' WHERE SID = '$SID' AND expiration >". time();

	   $result = $this->query($query);
	   if( !$result)
	   {
	   	return( false);
	   }
	  }
	  return strlen(value); /* Should be bytes written, whatever that means in a Mysql */


	}


	// deletes all session information having input SID (only one row)
	function destroy($SID) {
	  global $g_sessTable;

	  $SID = mysql_escape_string($SID);

	  $query = "DELETE FROM $g_sessTable WHERE SID = '$SID'";
	  $result = $this->query($query);
	  if( $result && ($result != -1))
	  {
	    return mysql_affected_rows($result);
	  }
	  else
	  {
	  	return 0;
	  }
	}


	// deletes all sessions that have expired.
	function garbage_collect($maxlifetime) {

	  global $g_sessTable;
	  $maxlifetime = mysql_escape_string($maxlifetime);
	
	  $query = "DELETE FROM $g_sessTable WHERE expiration < " . (time() - $maxlifetime);
	  $result = $this->query($query);
	  return( true);
	}

}

?>

session_save_path("home/mysite/www/assets/sessions/");

php_value session.save_path /home/mysite/www/assets/sessions/