myisam_max_[extra]_sort_file_size足够大 delay_key_write减少io,提高写入性能 bulk_insert_buffer_size concurrent_insert 设置为2 read_rnd_buffer_size random scan 使用 read_buffer_size 顺序扫描表使用 key cache 的三种方式 key cache 预加载 SET GLOBAL hot_cache.key_buffer_size=16m SET BLOBAL cold_cache.key_buffer_size=16m CACHE INDEX example.top_message IN hot_cache CACHE INDEX example.event IN cold_cache LOAD INDEX INTO CACHE example.top_message,example.event IGNORE LEAVES LOAD INDEX INTO CACHE example.user IGNORE LEAVERS,expamle.groups [url=http://www.1sucai.cn/article/17413.htm]MySQL 优化设置步骤[/url]