[Oracle工程师手记]如何收集 RMAN 工作时的 10046 trace

有的时候，我需要收集 RMAN 执行时的 10046 trace ，我应该怎么作呢？ RMAN 可以执行 sql 语句，例如：

RMAN>sql "alter system swtich logfile";

所以，我可以用这种方式设置 10046 trace ，让RMAN的运行获得 10046 trace。

首先，在OS上设置环境变量 NLS_DATE_FORMAT：

Windows:
 C:> set NLS_DATE_FORMAT=DD-MON-YYYY.HH24:MI:SS

Linux/Unix Bash shell:
$ export NLS_DATE_FORMAT="DD-MON-YYYY.HH24:MI:SS"

Linux /Unix K Shell:
$ NLS_DATE_FORMAT="DD-MON-YYYY.HH24:MI:SS" ; export NLS_DATE_FORMAT

Linux /Unix C Shell:
% setenv NLS_DATE_FORMAT "DD-MON-YYYY.HH24:MI:SS"

 
然后，在 RMAN 执行时，指定 10046：

RMAN> sql "alter session set tracefile_identifier=''rman_10046''";
RMAN> sql "alter session set events ''10046 trace name context forever,level 12''";
RMAN> run-your-commands;
RMAN> exit;

 
执行的过程：

RMAN> sql "alter session set tracefile_identifier=''rman_10046''";

sql statement: alter session set tracefile_identifier=''rman_10046''

RMAN> sql "alter session set events ''10046 trace name context forever,level 12''";

sql statement: alter session set events ''10046 trace name context forever,level 12''

RMAN> backup database;

Starting backup at 08-APR-21
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=/myoraclehomeapp/12.2.0.1/oracle/oradata/orcl12201/system01.dbf
input datafile file number=00003 name=/myoraclehomeapp/12.2.0.1/oracle/oradata/orcl12201/sysaux01.dbf
input datafile file number=00004 name=/myoraclehomeapp/12.2.0.1/oracle/oradata/orcl12201/undotbs01.dbf
input datafile file number=00007 name=/myoraclehomeapp/12.2.0.1/oracle/oradata/orcl12201/users01.dbf
channel ORA_DISK_1: starting piece 1 at 08-APR-21
channel ORA_DISK_1: finished piece 1 at 08-APR-21
piece handle=/myoraclehomeapp/12.2.0.1/oracle/product/12.2.0.1/dbhome3/dbs/04vropou_1_1 tag=TAG20210408T070254 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:17
Finished backup at 08-APR-21

Starting Control File and SPFILE Autobackup at 08-APR-21
piece handle=/myoraclehomeapp/12.2.0.1/oracle/product/12.2.0.1/dbhome3/dbs/c-1362151495-20210408-01 comment=NONE
Finished Control File and SPFILE Autobackup at 08-APR-21

RMAN> exit;

 
执行完毕后，在 $ORACLE_BASE/diag/rdbms/<db_name>/<oralce_sid>/trace 下，可以看到 文件名含有 10046 的 trace 文件被生成。

-rw-r----- 1 oracle oracle  701468 Apr  8 07:05 orcl12201_ora_3246_rman_10046.trm
-rw-r----- 1 oracle oracle 4879024 Apr  8 07:05 orcl12201_ora_3246_rman_10046.trc