[ORACLE]获取当前会话的跟踪文件路径

获取当前会话的跟踪文件路径

DUMP path

SELECT d.VALUE 
|| '/' 
|| LOWER (RTRIM (i.INSTANCE, CHR (0))) 
|| '_ora_' 
|| p.spid 
|| '.trc' trace_file_name 
FROM 
     (SELECT p.spid FROM v$mystat m, v$session s, v$process p  WHERE m.statistic# = 1 AND s.SID = m.SID AND p.addr = s.paddr) p, ----获取当前会话的系统进程id
     (SELECT t.INSTANCE FROM v$thread t, v$parameter v  WHERE v.NAME = 'thread'  AND (v.VALUE = 0 OR t.thread# = TO_NUMBER (v.VALUE))) i,  ----->获取实例名
     (SELECT VALUE  FROM v$parameter  WHERE NAME = 'user_dump_dest') d ; ---->获取DUMP的主路径

trace path

SELECT d.VALUE 
|| '/' 
|| LOWER (RTRIM (i.INSTANCE, CHR (0))) 
|| '_ora_' 
|| p.spid 
|| '.trc' trace_file_name 
FROM 
     (SELECT p.spid FROM v$mystat m, v$session s, v$process p  WHERE m.statistic# = 1 AND s.SID = m.SID AND p.addr = s.paddr) p, ----获取当前会话的系统进程id
     (SELECT t.INSTANCE FROM v$thread t, v$parameter v  WHERE v.NAME = 'thread'  AND (v.VALUE = 0 OR t.thread# = TO_NUMBER (v.VALUE))) i,  ----->获取实例名
     (select value from v$diag_info where name='Diag Trace') d ; ---->获取跟踪文件的主路径

SQL> col value for A60
SQL> select * from v$diag_info;

   INST_ID NAME              VALUE                                  CON_ID
---------- ------------------------- ------------------------------------------------------------ ----------
     1 Diag Enabled          TRUE                                   0
     1 ADR Base             /oracle/D4C                               0
     1 ADR Home             /oracle/D4C/diag/rdbms/d4cdb/D4C                       0
     1 Diag Trace             /oracle/D4C/diag/rdbms/d4cdb/D4C/trace                   0
     1 Diag Alert             /oracle/D4C/diag/rdbms/d4cdb/D4C/alert                   0
     1 Diag Incident         /oracle/D4C/diag/rdbms/d4cdb/D4C/incident                   0
     1 Diag Cdump             /oracle/D4C/diag/rdbms/d4cdb/D4C/cdump                   0
     1 Health Monitor         /oracle/D4C/diag/rdbms/d4cdb/D4C/hm                   0
     1 Default Trace File         /oracle/D4C/diag/rdbms/d4cdb/D4C/trace/D4C_ora_4244.trc           0
     1 Active Problem Count      1                                       0
     1 Active Incident Count     50                                    0
     1 ORACLE_HOME             /oracle/D4C/193                               0

12 rows selected.

SQL> select tracefile from v$process where addr in (select paddr from v$session where sid in (select sid from v$mystat));

TRACEFILE
------------------------------------------------------------------------------------------------------------------------------------------------------
/oracle/D4C/diag/rdbms/d4cdb/D4C/trace/D4C_ora_10115.trc

v$mystat,v$sesstat是用来分别统计会话级别和自实例起动以来数据库各种统计信息的。两个视图结构一致，只是统计数据不一致。可以说v$mystat是v$sesstat的子集。v$mystat视图中只会有当前用户的会话信息，v$sesstat会有整个实例内所有会话信息

v$statname,v$sysstat视图结构的差别就是v$sysstat比v$statname多一个value列。

查某条DML语句所产生的redo信息。可以这样写:
　　　select value from v$mystat t,v$statname t1 where t.STATISTIC# = t1.STATISTIC# and t1.NAME = 'redo size'