我已经在我的电脑上安装了 memcached 1.4，以下 php 代码运行良好：
<?php
$memcache = new Memcache;
$memcache->connect("localhost",11211); # You might need to set "localhost" to "127.0.0.1"
echo "Server's version: " . $memcache->getVersion() . "<br />\n";
$tmp_object = new stdClass;
$tmp_object->str_attr = "test";
$tmp_object->int_attr = 123;
$memcache->set("key",$tmp_object,false,10);
echo "Store data in the cache (data will expire in 10 seconds)<br />\n";
echo "Data from the cache:<br />\n";
var_dump($memcache->get("key"));
?>
现在我想将 memcache 添加到 magento。我改变了 ma local xml 从
<?xml version="1.0"?>
<!-- /** * Magento * * NOTICE OF LICENSE * * This source file is subject
to the Academic Free License (AFL 3.0) * that is bundled with this package
in the file LICENSE_AFL.txt. * It is also available through the world-wide-web
at this URL: * http://opensource.org/licenses/afl-3.0.php * If you did not
receive a copy of the license and are unable to * obtain it through the world-wide-web,
please send an email * to license@magentocommerce.com so we can send you
a copy immediately. * * DISCLAIMER * * Do not edit or add to this file if
you wish to upgrade Magento to newer * versions in the future. If you wish
to customize Magento for your * needs please refer to http://www.magentocommerce.com
for more information. * * @category Mage * @package Mage_Core * @copyright
Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
* @license http://opensource.org/licenses/afl-3.0.php Academic Free License
(AFL 3.0) */ -->
<config>
<global>
<install>
<date><![CDATA[Tue, 09 Oct 2012 15:36:30 +0000]]></date>
</install>
<crypt>
<key><![CDATA[]]>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX</key>
</crypt>
<disable_local_modules>false</disable_local_modules>
<resources>
<db>
<table_prefix><![CDATA[]]>
</table_prefix>
</db>
<default_setup>
<connection>
<host><![CDATA[localhost]]></host>
<username><![CDATA[root]]></username>
<password><![CDATA[]]>
</password>
<dbname><![CDATA[magento]]></dbname>
<initStatements><![CDATA[SET NAMES utf8]]></initStatements>
<model><![CDATA[mysql4]]></model>
<type><![CDATA[pdo_mysql]]></type>
<pdoType><![CDATA[]]>
</pdoType>
<active>1</active>
</connection>
</default_setup>
</resources>
<session_save><![CDATA[db]]></session_save>
</global>
<admin>
<routers>
<adminhtml>
<args>
<frontName><![CDATA[admin]]></frontName>
</args>
</adminhtml>
</routers>
</admin>
</config>
到
<?xml version="1.0"?>
<!-- /** * Magento * * NOTICE OF LICENSE * * This source file is subject
to the Academic Free License (AFL 3.0) * that is bundled with this package
in the file LICENSE_AFL.txt. * It is also available through the world-wide-web
at this URL: * http://opensource.org/licenses/afl-3.0.php * If you did not
receive a copy of the license and are unable to * obtain it through the world-wide-web,
please send an email * to license@magentocommerce.com so we can send you
a copy immediately. * * DISCLAIMER * * Do not edit or add to this file if
you wish to upgrade Magento to newer * versions in the future. If you wish
to customize Magento for your * needs please refer to http://www.magentocommerce.com
for more information. * * @category Mage * @package Mage_Core * @copyright
Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
* @license http://opensource.org/licenses/afl-3.0.php Academic Free License
(AFL 3.0) */ -->
<config>
<global>
<install>
<date><![CDATA[Tue, 09 Oct 2012 15:36:30 +0000]]></date>
</install>
<crypt>
<key><![CDATA[XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX]]></key>
</crypt>
<disable_local_modules>false</disable_local_modules>
<resources>
<db>
<table_prefix><![CDATA[]]>
</table_prefix>
</db>
<default_setup>
<connection>
<host><![CDATA[localhost]]></host>
<username><![CDATA[root]]></username>
<password><![CDATA[]]>
</password>
<dbname><![CDATA[magento]]></dbname>
<initStatements><![CDATA[SET NAMES utf8]]></initStatements>
<model><![CDATA[mysql4]]></model>
<type><![CDATA[pdo_mysql]]></type>
<pdoType><![CDATA[]]>
</pdoType>
<active>1</active>
</connection>
</default_setup>
</resources>
<session_save><![CDATA[db]]></session_save>
<cache>
<backend>memcached</backend><!-- apc / memcached / empty=file -->
<memcached><!-- memcached cache backend related config -->
<servers><!-- any number of server nodes can be included -->
<server>
<host><![CDATA[127.0.0.1]]></host>
<port><![CDATA[11211]]></port>
<persistent><![CDATA[1]]></persistent>
</server>
</servers>
<compression><![CDATA[0]]></compression>
<cache_dir><![CDATA[]]>
</cache_dir>
<hashed_directory_level><![CDATA[]]>
</hashed_directory_level>
<hashed_directory_umask><![CDATA[]]>
</hashed_directory_umask>
<file_name_prefix><![CDATA[]]>
</file_name_prefix>
</memcached>
</cache>
</global>
<admin>
<routers>
<adminhtml>
<args>
<frontName><![CDATA[admin]]></frontName>
</args>
</adminhtml>
</routers>
</admin>
</config>
但现在我得到了错误
a:5:{i:0;s:86:"SQLSTATE[HY000] [1045] Access denied for user 'root'@'localhost' (using password: YES)";i:1;s:1653:"#0 \lib\Zend\Db\Adapter\Pdo\Mysql.php(96): Zend_Db_Adapter_Pdo_Abstract->_connect()
当我删除标签时，商店再次运行良好。怎么了？