Alert log XML文件位置: SQL> select value from v$diag_info where name ='Diag Alert'; Alert log文本文件位置: SQL> select value from v$diag_info where name ='Diag Trace';
-- 查询语句 select a.ksppinm name, b.ksppstvl value, a.ksppdesc description from x$ksppi a, x$ksppcv b where a.indx = b.indx and a.ksppinm = '_optimizer_join_elimination_enabled'; -- 关闭命令 alter system set "_optimizer_join_elimination_enabled"=false scope=both; -- 设置完后不用重启服务