Magento清理数据库日志，给数据库瘦身

truncate dataflow_batch_export;
truncate dataflow_batch_import;
truncate log_customer;
truncate log_quote;
truncate log_summary;
truncate log_summary_type;
 
truncate log_url;
truncate log_url_info;
truncate log_visitor;
truncate log_visitor_info;
truncate log_visitor_online;
 
truncate report_viewed_product_index;
truncate report_compared_product_index;
truncate report_event;
    
set foreign_key_checks = 0;
truncate index_process_event;
truncate index_event;
set foreign_key_checks = 1;