下面是10046事件的几个等级分别表示什么意思

Level 0 Tracing is disabled. This is the same as setting SQL_TRACE = FALSE. 

Level 1 Standard SQL trace information (SQL_TRACE = TRUE). This is the default level. 

Level 4 SQL trace information plus bind variable values. 

Level 8 SQL trace information plus wait event information. 

Level 12 SQL trace information, wait event information, and bind variable values. 

   下面是常见的几种方法

一、trace当前进程

1，event方法 

alter session set timed_statistics = true; 

alter session set max_dump_file_size = unlimited; 

alter session set events '10046 trace name context forever, level 8'; 

alter session set events '10046 trace name context off';     

2，dbms_support方法 

alter session set timed_statistics = true; 

alter session set max_dump_file_size = unlimited; 

exec sys.dbms_support.start_trace; 

--To include Bind variable values, Wait Event data with SQL trace 

exec sys.dbms_support.start_trace(waits => TRUE, binds=> TRUE) 

exec sys.dbms_support.stop_trace; 

3，oradebug 方法 

alter system set timed_statistics = true; 

SQL> oradebug setmypid 

Statement processed. 

SQL> oradebug unlimit; 

Statement processed. 

SQL> oradebug event 10046 trace name context forever,level 8 

Statement processed. 

二，trace其它进程

  在trace其它进程前，先修改下面两个参数的值 -- Set TIME_STATISTICS to TRUE for SID 10, Serial# 118 

exec sys.dbms_system.set_bool_param_in_session(- 

sid => 10, - 

serial# => 118, - 

parnam => 'TIMED_STATISTICS',- 

bval => true); 

-- Set MAX_DUMP_FILE_SIZE to 2147483647 

-- for SID 10, Serial# 118 

exec sys.dbms_system.set_int_param_in_session(- 

sid => 10,- 

serial# => 118,- 

parnam => 'MAX_DUMP_FILE_SIZE',- 

intval => 2147483647); 

1，使用dbms_support方法 

-- Enable ‘level 12’ trace in session 10 with serial# 118 

exec dbms_support.start_trace_in_session(- 

sid => 10,- 

serial => 118,- 

waits => true,- 

binds => true); 

-- Let the session execute SQL script or -- program for some amount of time  

-- To turn off the tracing: 

exec dbms_support.stop_trace_in_session(- 

sid => 10, - 

serial => 118); 

2，使用DBMS_SYSTEM  

-- Enable trace at level 8 for session 10 with serial# 118 

exec dbms_system.set_ev( 10, 118, 10046, 8, '');   

-- Let the session execute SQL script or-- program for some amount of time  

-- To turn off the tracing: 

exec dbms_system.set_ev( 10, 118, 10046, 0, ''); 

3，使用oradebug工具 

在使用oradebug工具前，我们得先查找到sess在操作系统上面的进程号，可以使用下面的SQL来查询 

select s.username,p.spid os_process_id,p.pid oracle_process_id from   v$session s, v$process p where  s.paddr = p.addr and s.sid=&sid; 

查看进程号后，使用下面的命令 

alter system set timed_statistics = true; 

oradebug setospid 6509;   

-- 6509 is the OS process id for the session 

oradebug unlimit; 

oradebug event 10046 trace name context forever, level 8; 

-- Let the session execute SQL script  

-- or program for some amount of time  

-- To turn off the tracing: 

oradebug event 10046 trace name context off; 

4，使用dbms_monitor 

exec dbms_monitor.session_trace_enable( -      

session_id => 10,-      

serial_num => 118, -      

waits => true, -      

binds => true); 

-- Let the session execute SQL script or -- program for some amount of time  

-- To turn off the tracing: 

exec dbms_monitor.session_trace_disable( -      

session_id => 10, -      

serial_num => 118);  

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traceoradebugORACLE 基础