General SQL_TRACE / 10046 trace Gathering Examples (文档 ID 1274511.1)

In this Document

Goal

Fix

Pre-requisites for successful tracing

Tracing the Current Session

SQL_TRACE

10046

DBMS_SUPPORT

Tracing from Another Session

Using "dbms_system.SET_BOOL_PARAM_IN_SESSION"

Using "dbms_system.set_ev"

Using "dbms_system.set_sql_trace_in_session"

Using "sys.dbms_monitor"

Using Oradebug (as SYS)

Use a Logon Trigger

References

APPLIES TO:

Oracle Server - Enterprise Edition - Version 9.2.0.8 to 11.2.0.3 [Release 9.2 to 11.2]
Information in this document applies to any platform.

GOAL

This article illustrates numerous methods by which session tracing may be initiated.

FIX

Note: To Collect Trace for Diagnosis Performance issues, it is recommended to use :

Note:376442.1 * How To Collect 10046 Trace (SQL_TRACE) Diagnostics for Performance Issues

 

Pre-requisites for successful tracing

Set <PARAMETER: TIMED_STATISTICS> to TRUE
Set <PARAMETER: MAX_DUMP_FILE_SIZE>  to a high value or œunlimited

Tracing the Current Session

SQL_TRACE

Start tracing:

ALTER SESSION SET SQL_TRACE = TRUE ;
/* execute your selects to be traced */

Stop tracing:

ALTER SESSION SET SQL_TRACE = FALSE;

10046

To start tracing:

Alter session set events '˜10046 trace name context forever, level 12';
/* execute your selects to be traced */

To stop tracing

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

DBMS_SUPPORT

To start tracing:

exec sys.dbms_support.start_trace ;
/* execute your selects to be traced */

To stop tracing:

exec sys.dbms_support.stop_trace ;

 Tracing from Another Session

The examples below demonstrate how to trace session with SID=8 and Serial# =226 obtained from V$SESSION.

Using "dbms_system.SET_BOOL_PARAM_IN_SESSION"

To start tracing:

exec sys.dbms_system.SET_BOOL_PARAM_IN_SESSION(18, 226, 'sql_trace', TRUE);
/* execute your selects to be traced */

To stop tracing:

exec sys.dbms_system.SET_BOOL_PARAM_IN_SESSION(18, 226, 'sql_trace', FALSE);

Using "dbms_system.set_ev"

To start tracing:

exec dbms_system.set_ev(18, 226, 10046, 12, '');

To stop tracing:

exec dbms_system.set_ev(18, 226, 10046, 0, '');

Using "dbms_system.set_sql_trace_in_session"

To start tracing:

exec dbms_system.set_sql_trace_in_session(18,226,TRUE);
/* execute your selects to be traced */

To stop tracing:

exec dbms_system.set_sql_trace_in_session(18,226,FALSE);

Using "sys.dbms_monitor"

To start tracing:

exec sys.dbms_monitor.session_trace_enable(session_id=>18,serial_num=>226, waits=>true, binds=>true);
/* execute your selects to be traced */

To stop tracing:

exec sys.dbms_monitor.session_trace_disable(session_id=>18,serial_num=>226);

Using Oradebug (as SYS)

To start tracing:

oradebug setospid xxxx
oradebug event 10046 trace name context forever, level 12;
/* In the session being traced execute the selects  */ 

To stop tracing:

oradebug event 10046 trace name context off ;

Use a Logon Trigger

To start tracing:

create or replace trigger user_logon_trg
after logon on database
begin
if USER = 'xxxx' then
execute immediate
'Alter session set events ''10046 trace name context forever, level 8''';
end if;
end;
/

/* Login a new session as User 'xxxx' and execute your selects to be traced */

To stop tracing: via LogOff Trigger (needs to be created before logging off)

create or replace trigger user_logoff_trg
before logoff on database
begin
if USER = 'xxxx' then
execute immediate
'Alter session set events ''10046 trace name context off''';
end if;
end;
/

REFERENCES

相关内容

产品

• Oracle Database Products > Oracle Database > Oracle Database > Oracle Database - Enterprise Edition > RDBMS > Diagnosability Event Mechanism

关键字

DBMS_MONITOR; DBMS_SYSTEM.SET_BOOL_PARAM_IN_SESSION; DBMS_SYSTEM.SET_EV; DBMS_SYSTEM.SET_SQL_TRACE_IN_SESSION; LOGOFF; LOGON; ORADEBUG; SQL_TRACE; TRACE; TRIGGER