Tracing Oracle Sql

 

ORADEBUG DOC EVENT NAME SQL_TRACE
ORADEBUG EVENT SQL_TRACE BIND=TRUE,WAIT=TRUE
ORADEBUG EVENT SQL_TRACE PLAN_STAT=ALL_EXECUTIONS
ORADEBUG EVENT SQL_TRACE LEVEL=4
ORADEBUG EVENT SQL_TRACE OFF

prompt &_C_REVERSE *** Enable tracing specified query by sid and sql_id
ORADEBUG SETOSPID &OSPID
oradebug TRACEFILE_NAME;
oradebug EVENT sql_trace [sql: sql_id=&SQLID]
prompt Execute "oradebug EVENT sql_trace off;" later for disabling...

ALTER SYSTEM SET EVENTS sql_trace  [sql: sql_id=3s1yukp05bzg6|aca4xvmz0rzup] bind=true, wait=true';


 SQL> oradebug setospid  <SPID> 
 SQL> oradebug unlimit
 SQL> oradebug tracefile_name
 SQL> oradebug event sql_trace [sql: 5qcyrymp65fak] level=12

 关闭 event ++：
 SQL>  oradebug event sql_trace [sql: 5qcyrymp65fak] off


 SQL> alter system set events 'sql_trace [sql: 5qcyrymp65fak] level=12';
 SQL>  alter system set events 'sql_trace [sql: 5qcyrymp65fak] off';




--After gathering the SQL ID use dbms_sqldiag to dump the query trace
exec dbms_sqldiag.dump_trace(p_sql_id => '73xq8qpz6c61g',   --ID of the SQL query
                             p_child_number => 0,           --Child Number
                             p_component => 'Compiler',     --Component (OPTIONS: Optimizer (default) or Compiler)
                             p_file_id=> 'CBO_Trace')       --Name of the tracefile identifier




ALTER SESSION SET TRACEFILE_IDENTIFIER = "MY_TEST_SESSION";

SQL> — SQL Trace (10046)
SQL> ALTER SYSTEM SET EVENTS 'sql_trace [sql:&&sql_id] bind=true, wait=true';

SQL> — 10053
SQL> ALTER SESSION SET EVENTS 'trace[rdbms.SQL_Optimizer.*][sql:sql_id]';


-- to disable the events:
alter system set events 'sql_trace off';
alter system set events 'trace[sql_optimizer.*] off'





SQL> ALTER SESSION SET sql_trace=TRUE;
SQL> EXEC DBMS_SESSION.set_sql_trace(sql_trace => TRUE);
SQL> ALTER SESSION SET EVENTS '10046 trace name context forever, level 8';
SQL> EXEC DBMS_SYSTEM.set_sql_trace_in_session(sid=>123, serial#=>1234, sql_trace=>TRUE);
SQL> EXEC DBMS_SYSTEM.set_ev(si=>123, se=>1234, ev=>10046, le=>8, nm=>'');

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