set global slow_query_log=1;
set global long_query_time=10;
set global slow_query_log_file ~/hostname-slow.log
set global log_queries_not_using_indexes=1;
set global log_throttle_queries_not_using_indexes=0
测试时
set session long_query_time=1;
set session log_throttle_queries_not_using_indexes=0
