10g以前，对别的session做10046跟踪,sql_trace跟踪需要用到dbms_system这个包，可以我在10gR2官方文档上面没有找到这个包的解释，然而这个包很重要，下面收集一些有用的过程，有备无患。
dbms_system.get_env(var IN VARCHAR2, val OUT VARCHAR2)
这个过程返回ORACLE的环境变量
例如：
SQL> declare env varchar2(200);
2 begin
3 dbms_system.get_env(‘ORACLE_HOME’,env);
4 dbms_output.put_line(env);
5 end;
6 /
C:/oracle/product/10.2.0/db_1 ——我的ORACLE_HOME
PL/SQL procedure successfully completed
SQL> declare sid varchar2(200);
2 begin
3 dbms_system.get_env(‘ORACLE_SID’,sid);
4 dbms_output.put_line(sid);
5 end;
6 /
robinson ——-我的ORACLE_SID
PL/SQL procedure successfully completed
dbms_system.read_ev (iev IN BINARY_INTEGER, oev OUT BINARY_INTEGER)
这个过程返回events level.
例如：
SQL> declare lev integer;
2 begin
3 dbms_system.read_ev(10046,lev);
4 dbms_output.put_line(lev);
5 end;
6 /
0 —0表示没有设置10046跟踪级别，因为10046级别只有1，4，8，12
PL/SQL procedure successfully completed
dbms_system.set_sql_trace_in_session(
sid NUMBER,
serial# NUMBER,
sql_trace BOOLEAN);
这个过程就是我们最常用的给别的SESSION 设置sql_trace跟踪了。
例如：
exec dbms_system.set_sql_trace_in_session(159,15,true);—开启SQL_TRACE跟踪
exec dbms_system.set_sql_trace_in_session(159,15,false);—关闭SQL_TRACE跟踪
dbms_system.set_ev(
si IN BINARY_INTEGER, — session id
se IN BINARY_INTEGER, — session serial number
ev IN BINARY_INTEGER, — event number between 10000 and 10999
le IN BINARY_INTEGER, — event level
nm IN VARCHAR2);
这个过程就是我们常用的给别的session设置10046跟踪了
例如：
exec dbms_system.set_ev(159,15,10046,8,’robinson’); —-开启级别为8的跟踪
exec dbms_system.set_ev(159,15,10046,0,’robinson’); —–关闭跟踪
dbms_system.set_int_param_in_session(
sid IN NUMBER,
serial# IN NUMBER,
parnam IN VARCHAR2,
intval IN BINARY_INTEGER);
这个过程给任意session设置integer的参数
例如：
SQL> exec dbms_system.set_int_param_in_session(159,15,’db_file_multiblock_read_count’,128);
PL/SQL procedure successfully completed
dbms_system.set_bool_param_in_session(
sid IN NUMBER,
serial# IN NUMBER,
parnam IN VARCHAR2,
bval IN BOOLEAN);
这个存储过程给任意的session设置boolean的参数
例如：
SQL> exec dbms_system.set_bool_param_in_session(159,15,’sql_trace’,TRUE);
PL/SQL procedure successfully completed
SQL> exec dbms_system.set_bool_param_in_session(159,15,’sql_trace’,FALSE);
PL/SQL procedure successfully completed
| General |
| Source |
{ORACLE_HOME}/rdbms/admin/prvtutil.plb |
| First Available |
7.3.4 |
| Constants |
| Name |
Value |
| trace_file |
1 |
| alert_file |
2 |
| ? |
3 |
|
| Dependencies |
SELECT name FROM dba_dependencies WHERE referenced_name = ‘DBMS_SYSTEM’
UNION
SELECT referenced_name FROM dba_dependencies WHERE name = ‘DBMS_SYSTEM’; |
| Security Model |
Execute is granted to OEM_MONITOR |
| |
| ADD_PARAMETER_VALUE (new in 11g) |
| Writes a listed parameter to the spfile following a call to ALTER SYSTEM SET. |
dbms_system.add_parameter_value(
parname IN VARCHAR2,
value IN VARCHAR2,
scope IN VARCHAR2,
sid IN VARCHAR2,
position IN BINARY_INTEGER); |
| col value format a100 SELECT value
FROM gv$parameter
WHERE name = ‘control_files’; exec dbms_system.add_parameter_value(‘control_files’, ‘c:/temp/control04.ctl’, ‘BOTH’, ‘orabase’, 4); SELECT value
FROM gv$parameter
WHERE name = ‘control_files’; |
| |
| DIST_TXN_SYNC |
| Distributed transaction synchronization used in XA interfaces. Not intended for end-user usage. |
dbms_system.dist_txn_sync(inst_num IN NUMBER); |
| exec dbms_system.dist_txn_sync(2); |
| |
| GET_ENV |
| Returns the value of environment variables |
dbms_system.get_env(var IN VARCHAR2, val OUT VARCHAR2); |
| set serveroutput on DECLARE
RetVal VARCHAR2(4000);
BEGIN
dbms_system.get_env(‘ORACLE_SID’, RetVal);
dbms_output.put_line(RetVal);
END;
/ DECLARE
RetVal VARCHAR2(100);
BEGIN
dbms_system.get_env(‘ORACLE_HOME’, RetVal);
dbms_output.put_line(RetVal);
END;
/ |
| |
| KCFRMS |
| Resets the timers displayed by MAX_WAIT in GV$SESSION_EVENT and MAXIORTM and MAXIOWTM in GV$FILESTAT (X$KCFIO) |
dbms_system.kcfrms; |
| SELECT max_wait FROM gv_$session_event; SELECT maxiortm, maxiowtm FROM gv_$filestat; exec dbms_system.kcfrms; SELECT max_wait FROM gv_$session_event; SELECT maxiortm, maxiowtm FROM gv_$filestat; |
| |
| KSDDDT |
| Prints the date stamp to the target file (alert log and/or trace file) |
dbms_system.ksdddt; |
| exec dbms_system.ksdddt; |
| |
| KSDFLS |
| Flushes any pending output to the target alert log or trace file |
dbms_system.ksdfls; |
| exec dbms_system.ksdfls; |
| |
| KSDIND |
| Does an ‘indent’ before the next write (ksdwrt) by printing that many colons (:) before the next write. |
dbms_system.ksdind(lvl IN BINARY_INTEGER); Range of valid values from 0 to 30. |
exec dbms_system.ksdind(5);
exec dbms_system.ksdwrt(3, ‘Test Message’); |
| |
| KSDWRT |
| Prints a message to the target file (alert log and/or trace file) |
dbms_system.ksdwrt (dest IN BINARY_INTEGER, tst IN VARCHAR2); 1: Write to the standard trace file
2: Write to the alert log
3: Write to both files at once |
exec dbms_system.ksdwrt(3, ‘– Start Message –’);
exec dbms_system.ksdwrt(3, ‘Test Message’);
exec dbms_system.ksdwrt(3, ‘– End Message –’); |
| |
| READ_EV |
| Get the level for events set in the current session |
dbms_system.read_ev (iev IN BINARY_INTEGER, oev OUT BINARY_INTEGER); lev: event numbers 10000 to 10999
event level: default is 0 if not set |
| ALTER SYSTEM SET SQL_TRACE=TRUE; set serveroutput on DECLARE
lev BINARY_INTEGER;
BEGIN
dbms_system.read_ev(10046, lev);
dbms_output.put_line(lev);
END;
/ |
| |
| REMOVE_PARAMETER_VALUE (new in 11g) |
| Removes a listed parameter to the spfile following a call to ALTER SYSTEM SET. Overload 1 |
dbms_system.remove_parameter_value(
parname IN VARCHAR2,
value IN VARCHAR2,
scope IN VARCHAR2,
sid IN VARCHAR2); |
| TBD |
| Overload 2 |
dbms_system.remove_parameter_value(
parname IN VARCHAR2,
position IN BINARY_INTEGER,
scope IN VARCHAR2,
sid IN VARCHAR2); |
| TBD |
| |
| SET_BOOL_PARAM_IN_SESSION |
| Sets boolean-type init.ora parameters in any session |
dbms_system.set_bool_param_in_session(
sid IN NUMBER,
serial# IN NUMBER,
parnam IN VARCHAR2,
bval IN BOOLEAN); |
| exec dbms_system.set_bool_param_in_session(10, 161, ‘sql_trace’, TRUE); |
| |
| SET_EV |
| Set event trace level |
dbms_system.set_ev(
si IN BINARY_INTEGER, — session id
se IN BINARY_INTEGER, — session serial number
ev IN BINARY_INTEGER, — event number between 10000 and 10999
le IN BINARY_INTEGER, — event level
nm IN VARCHAR2);
| Level |
Waits |
Binds |
| 1 |
False |
False |
| 4 |
False |
True |
| 8 |
True |
False |
| 12 |
True |
True |
|
| exec dbms_system.set_ev(10, 1008, 10046, 12, NULL); |
| |
| SET_INT_PARAM_IN_SESSION |
| Sets integer-type init.ora parameters in any session |
dbms_system.set_int_param_in_session(
sid IN NUMBER,
serial# IN NUMBER,
parnam IN VARCHAR2,
intval IN BINARY_INTEGER); |
| exec dbms_system.set_int_param_in_session(10, 161, ‘sort_area_size’, 1048576); |
| |
| SET_SQL_TRACE_IN_SESSION |
| Turn tracing on or off in any session |
dbms_system.set_sql_trace_in_session(
sid NUMBER,
serial# NUMBER,
sql_trace BOOLEAN); |
| exec dbms_system.set_sql_trace_in_session(10, 1008, TRUE); exec dbms_system.set_sql_trace_in_session(10, 1008, FALSE); |
| |
| WAIT_FOR_EVENT |
| Puts the current session into a wait state for any named wait event |
dbms_system.wait_for_event(
event VARCHAR2,
extended_id BINARY_INTEGER,
timeout BINARY_INTEGER); extended_id is placed into the P1 column of gv_$session_wait |
| exec dbms_system.wait_for_event(‘rdbms ipc message’, 50, 20); SELECT sid, event, p1, seconds_in_wait, state
FROM gv_$session_wait
WHERE sid = 10; |
|
