magento本身会记录很多日志，这些日志长年累积会占用非常大的空间。下面是一些日志表

•    ’dataflow_batch_export’,
•    ’dataflow_batch_import’,
•    ’log_customer’,
•    ’log_quote’,
•    ’log_summary’,
•    ’log_summary_type’,
•    ’log_url’,
•    ’log_url_info’,
•    ’log_visitor’,
•    ’log_visitor_info’,
•    ’log_visitor_online’,
•    ’report_event’,
•    ’report_compared_product_index’,
•    ’report_viewed_product_index’,

上面这些日志表基本上在我的项目开发中占用了DB的一半的空间。比如MAGENTO数据库一共4G这些表的数据就占了2G多

而很多时间这些表数据根本不会用到，所以定时清理很有必要

清除方法

一：后台清除
1：登入后太 System > Configuration.
2：左侧菜单 Advanced 下点击 System.
3：在”Log Cleaning”下, 改变”Enable Log Cleaning” 为 YES 并且配置Save Log 为15 days:

二：代码清除：

<?php
/**
 * Magento Maintenance Script
 *
 * @version    3.0.0
 * @author     Crucial Web Hosting <sales@crucialwebhost.com>
 * @copyright  Copyright (c) 2006-2013 Crucial Web Hosting, Ltd.
 * @link       http://www.crucialwebhost.com  Crucial Web Hosting
 */

switch($_GET['clean']) {
    case 'log':
        clean_log_tables();
    break;
    case 'var':
        clean_var_directory();
    break;
}

function clean_log_tables() {
    $xml = simplexml_load_file('./app/etc/local.xml', NULL, LIBXML_NOCDATA);
    
    if(is_object($xml)) {
        $db['host'] = $xml->global->resources->default_setup->connection->host;
        $db['name'] = $xml->global->resources->default_setup->connection->dbname;
        $db['user'] = $xml->global->resources->default_setup->connection->username;
        $db['pass'] = $xml->global->resources->default_setup->connection->password;
        $db['pref'] = $xml->global->resources->db->table_prefix;
        
        $tables = array(
            'adminnotification_inbox',
            'aw_core_logger',
            'dataflow_batch_export',
            'dataflow_batch_import',
            'log_customer',
            'log_quote',
            'log_summary',
            'log_summary_type',
            'log_url',
            'log_url_info',
            'log_visitor',
            'log_visitor_info',
            'log_visitor_online',
            'index_event',
            'report_event',
            'report_viewed_product_index',
            'report_compared_product_index',
            'catalog_compare_item',
            'catalogindex_aggregation',
            'catalogindex_aggregation_tag',
            'catalogindex_aggregation_to_tag'
        );
        
        mysql_connect($db['host'], $db['user'], $db['pass']) or die(mysql_error());
        mysql_select_db($db['name']) or die(mysql_error());
        
        foreach($tables as $table) {
            @mysql_query('TRUNCATE `'.$db['pref'].$table.'`');
        }
    } else {
        exit('Unable to load local.xml file');
    }
}

function clean_var_directory() {
    $dirs = array(
        'downloader/.cache/',
        'downloader/pearlib/cache/*',
        'downloader/pearlib/download/*',
        'var/cache/',
        'var/locks/',
        'var/log/',
        'var/report/',
        'var/session/',
        'var/tmp/'
    );
    
    foreach($dirs as $dir) {
        exec('rm -rf '.$dir);
    }
}