物理备库在read only时报ORA-01552错误

Tue Jan 06 11:53:38 中国标准时间 2015
alter database open read only
Tue Jan 06 11:53:38 中国标准时间 2015
SMON: enabling cache recovery
Tue Jan 06 11:53:39 中国标准时间 2015
Database Characterset is ZHS16GBK
Opening with internal Resource Manager plan
replication_dependency_tracking turned off (no async multimaster replication found)
Physical standby database opened for read only access.
Completed: alter database open read only
Tue Jan 06 11:54:04 中国标准时间 2015
Errors in file c:\oracle\product\10.2.0\admin\ntsy\udump\ntsy_ora_9080.trc:
ORA-00604: 递归 SQL 级别 1 出现错误
ORA-01552: 非系统表空间 'MY_SPACE' 不能使用系统回退段
ORA-06512: 在 line 2

分析trace文件

*** ACTION NAME:() 2015-01-06 11:54:04.828
*** MODULE NAME:(sqlplus.exe) 2015-01-06 11:54:04.828
*** SERVICE NAME:(SYS$USERS) 2015-01-06 11:54:04.828
*** SESSION ID:(1284.9) 2015-01-06 11:54:04.828
Error in executing triggers on connect internal
*** 2015-01-06 11:54:04.828
ksedmp: internal or fatal error
ORA-00604: 递归 SQL 级别 1 出现错误
ORA-01552: 非系统表空间 'MY_SPACE' 不能使用系统回退段
ORA-06512: 在 line 2
*** 2015-01-06 11:54:05.843
Process diagnostic dump for ORACLE.EXE (MMNL), OS id=10492,
pid: 13, proc_ser: 1, sid: <no session>

这里可以看出来，是由于执行触发器导致该问题,根据经验第一感觉很可能是logon之类的触发器导致。

查询触发器

SQL> select trigger_name,trigger_type,OWNER from dba_triggers where owner='OP';
TRIGGER_NAME                   TRIGGER_TYPE     OWNER
------------------------------ ---------------- ------------------------------
LOGAD                          AFTER EVENT      OP
TR_TRACE_DDL                   AFTER EVENT      OP

只有这两个触发器是基于事件的,另外从名字和dba_source中确定

SQL> select text from dba_source where name='LOGAD';
TEXT
--------------------------------------------------------------------------------
TRIGGER "OP".logad after logon on database
begin
insert into logad values (SYS_CONTEXT('USERENV', 'SESSION_USER'), SYSDATE,SYS_CO
NTEXT('USERENV','IP_ADDRESS')) ;
end;
已选择6行。
SQL> select text from dba_source where name='TR_TRACE_DDL';
TEXT
--------------------------------------------------------------------------------
TRIGGER "OP".tr_trace_ddl
AFTER ddl
ON database
DECLARE
sql_text ora_name_list_t;
state_sql ddl$trace.ddl_sql%TYPE;
BEGIN
FOR i IN 1..ora_sql_txt(sql_text) LOOP
state_sql := state_sql||sql_text(i);
END LOOP;
TEXT
--------------------------------------------------------------------------------
INSERT INTO ddl$trace(login_user,audsid,machine,ipaddress,
schema_user,schema_object,ddl_time,ddl_sql)
VALUES(ora_login_user,userenv('SESSIONID'),sys_context('userenv','host'),
sys_context('userenv','ip_address'),ora_dict_obj_owner,ora_dict_obj_name,SYSDATE
,state_sql);
EXCEPTION
WHEN OTHERS THEN
-- sp_write_log('捕获DDL语句异常错误：'||SQLERRM);
null;
END tr_trace_ddl;

基本上确定LOGAD是登录触发器,tr_trace_ddl是记录ddl触发器,那现在问题应该出在LOGAD的触发器上.因为该触发器在备库上当有用户登录之时,他也会工作插入记录到logad表中,由于数据库是只读,因此就出现了类似ORA-01552错误

解决方法
在触发器中加判断数据库角色条件,当数据库为物理备库之时才执行dml操作

SQL> CREATE OR REPLACE TRIGGER "OP".logad
  2  AFTER LOGON on database
  3  declare
  4  db_role varchar2(30);
  5  begin
  6  select database_role into db_role from v$database;
  7  If db_role <> 'PHYSICAL STANDBY' then
  8  insert into op.logad values (SYS_CONTEXT('USERENV', 'SESSION_USER'),
  9  SYSDATE,SYS_CONTEXT('USERENV','IP_ADDRESS')) ;
 10  end if;
 11  end;
 12  /
Warning: Trigger created with compilation errors.
SQL> show error;
Errors for TRIGGER "OP".logad:
LINE/COL ERROR
-------- -----------------------------------------------------------------
4/1      PL/SQL: SQL Statement ignored
4/40     PL/SQL: ORA-00942: table or view does not exist
SQL> conn / as sysdba
Connected.
SQL> grant select on v_$database to op;
Grant succeeded.
SQL> CREATE OR REPLACE TRIGGER "OP".logad
  2  AFTER LOGON on database
  3  declare
  4  db_role varchar2(30);
  5  begin
  6  select database_role into db_role from v$database;
  7  If db_role <> 'PHYSICAL STANDBY' then
  8  insert into op.logad values (SYS_CONTEXT('USERENV', 'SESSION_USER'),
  9 SYSDATE,SYS_CONTEXT('USERENV','IP_ADDRESS')) ;
 10  end if;
 12  end;
 12  /
Trigger created.

数据库open正常

Completed: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE cancel
Tue Jan 06 13:51:20 中国标准时间 2015
alter database open read only
Tue Jan 06 13:51:21 中国标准时间 2015
SMON: enabling cache recovery
Tue Jan 06 13:51:21 中国标准时间 2015
Database Characterset is ZHS16GBK
Opening with internal Resource Manager plan
replication_dependency_tracking turned off (no async multimaster replication found)
Physical standby database opened for read only access.
Tue Jan 06 13:51:23 中国标准时间 2015
db_recovery_file_dest_size of 102400 MB is 0.00% used. This is a
user-specified limit on the amount of space that will be used by this
database for recovery-related files, and does not reflect the amount of
space available in the underlying filesystem or ASM diskgroup.
Tue Jan 06 13:51:23 中国标准时间 2015
Completed: alter database open read only