E 例程已经启动。
Total System Global Area 4364148184 bytes
Fixed Size 736728 bytes
Variable Size 1845493760 bytes
Database Buffers 2516582400 bytes
Redo Buffers 1335296 bytes
数据库装载完毕。
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
/u01/oradata/gzhs/system01.dbf
/u01/oradata/gzhs/cwmlite01.dbf
/u01/oradata/gzhs/drsys01.dbf
/u01/oradata/gzhs/example01.dbf
/u01/oradata/gzhs/indx01.dbf
/u01/oradata/gzhs/odm01.dbf
/u01/oradata/gzhs/tools01.dbf
/u01/oradata/gzhs/users01.dbf
/u01/oradata/gzhs/xdb01.dbf
.........................
/u01/oradata/gzhs/UNDOTBS2.dbf
已选择23行。
SQL>
SQL> show parameter undo
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
undo_management string AUTO
undo_retention integer 10800
undo_suppress_errors boolean FALSE
undo_tablespace string UNDOTBS1
SQL> show parameter spfile
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
spfile string
.........................
.............
发现系统没有使用spfile,而初始化参数设置的undo表空间为UNDOTBS1
5. 检查参数文件
bash-2.03$ cd $ORACLE_HOME/dbs
bash-2.03$ ls
init.ora initgzhs.ora initgzhs.ora.old orapwgzhs
initdw.ora initgzhs.ora.hurray lkGZHS snapcf_gzhs.f
bash-2.03$ vi initgzhs.ora
"initgzhs.ora" [Incomplete last line] 105 lines, 3087 characters
####################################################
# Copyright (c) 1991, 2001, 2002 by Oracle Corporation
####################################################
###########################################
# Archive
###########################################
log_archive_dest_1=''''LOCATION=/u06/oradata/gzhs/arch''''
log_archive_format=%t_%s.dbf
log_archive_start=true
###########################################
# Cache and I/O
###########################################
db_block_size=8192
db_cache_size=2516582400
db_file_multiblock_read_count=16
###########################################
# Cursors and Library Cache
###########################################
open_cursors=300
......................
###########################################
# System Managed Undo and Rollback Segments
###########################################
undo_management=AUTO
undo_retention=10800
undo_tablespace=UNDOTBS1
:q!
.............
这个设置是极其可疑的.
怀疑参数文件和实际数据库设置不符.
6. 再次检查alert文件
查找对于UNDO表空间的操作
第一部分，创建数据库时的信息:
Sat Feb 7 20:30:12 2004
CREATE DATABASE gzhs
MAXINSTANCES 1
MAXLOGHISTORY 1
MAXLOGFILES 5
MAXLOGMEMBERS 3
MAXDATAFILES 100
DATAFILE ''''/u01/oradata/gzhs/system01.dbf'''' SIZE 500M REUSE AUTOEXTEND ON NEXT 10240K MAXSIZE UNLIMITED
EXTENT MANAGEMENT LOCAL
DEFAULT TEMPORARY TABLESPACE TEMP TEMPFILE ''''/u01/oradata/gzhs/temp01.dbf'''' SIZE 1000M REUSE AUTOEXTEND
ON NEXT 250M MAXSIZE UNLIMITED
UNDO TABLESPACE "UNDOTBS1" DATAFILE ''''/u01/oradata/gzhs/undotbs01.dbf'''' SIZE 1000M REUSE AUTOEXTEND ON
NEXT 100M MAXSIZE UNLIMITED
CHARACTER SET ZHS16GBK
NATIONAL CHARACTER SET AL16UTF16
LOGFILE GROUP 1 (''''/u01/oradata/gzhs/redo01.log'''') SIZE 256M,
GROUP 2 (''''/u01/oradata/gzhs/redo02.log'''') SIZE 256M,
GROUP 3 (''''/u01/oradata/gzhs/redo03.log'''') SIZE 256M
.............
注意，这也是OCP教材上提到的两种创建UNDO表空间的方式之一
第二部分,发现创建UNDOTBS2的记录信息:
Wed Mar 24 20:20:58 2004
/* OracleOEM */ CREATE UNDO TABLESPACE "UNDOTBS2"
DATAFILE ''''/u01/oradata/gzhs/UNDOTBS2.dbf'''' SIZE 1024M AUTOEXTEND ON NEXT 100M MAXSIZE UNLIMITED
Wed Mar 24 20:22:37 2004
Created Undo Segment _SYSSMU11$
Created Undo Segment _SYSSMU12$
Created Undo Segment _SYSSMU13$
Created Undo Segment _SYSSMU14$
Created Undo Segment _SYSSMU15$
Created Undo Segment _SYSSMU16$
Created Undo Segment _SYSSMU17$
Created Undo Segment _SYSSMU18$
Created Undo Segment _SYSSMU19$
Created Undo Segment _SYSSMU20$
Completed: /* OracleOEM */ CREATE UNDO TABLESPACE "UNDOTBS2"
Wed Mar 24 20:24:25 2004
Undo Segment 11 Onlined
Undo Segment 12 Onlined
Undo Segment 13 Onlined
Undo Segment 14 Onlined
Undo Segment 15 Onlined
Undo Segment 16 Onlined
Undo Segment 17 Onlined
Undo Segment 18 Onlined
Undo Segment 19 Onlined
Undo Segment 20 Onlined
Successfully onlined Undo Tablespace 15.
Undo Segment 1 Offlined
Undo Segment 2 Offlined
Undo Segment 3 Offlined
Undo Segment 4 Offlined
Undo Segment 5 Offlined
Undo Segment 6 Offlined
Undo Segment 7 Offlined
Undo Segment 8 Offlined
Undo Segment 9 Offlined
Undo Segment 10 Offlined
Undo Tablespace 1 successfully switched out.
.............
第三部分，新的UNDO表空间被应用
Wed Mar 24 20:24:25 2004
ALTER SYSTEM SET undo_tablespace=''''UNDOTBS2'''' SCOPE=MEMORY;
我们发现问题就在这里,创建了新的UNDO表空间以后，因为使用的是pfile文件，修改的只对当前实例生效，操作人员忘记了修改pfile文件.
如果使用spfile，缺省的修改范围是both,会同时修改spfile文件，就可以避免以上问题的出现.
第四部分，删除了UNDOTBS1的信息
Wed Mar 24 20:25:01 2004
/* OracleOEM */ DROP TABLESPACE "UNDOTBS1" INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS
Wed Mar 24 20:25:03 2004
Deleted file /u01/oradata/gzhs/undotbs01.dbf
Completed: /* OracleOEM */ DROP TABLESPACE "UNDOTBS1" INCLUDI
.............
这样再次重新启动数据库的时候，问题出现了，pfile中定义的UNDOTBS1找不到了，而且操作实在很久以前，没人能回忆起来，甚至无法得知是什么人的操作。
7. 更改pfile，启动数据库
修改undo表空间
###########################################
# System Managed Undo and Rollback Segments
###########################################
undo_management=AUTO
undo_retention=10800
undo_tablespace=UNDOTBS2
....
bash-2.03$ sqlplus "/ as sysdba"
SQL*Plus: Release 9.2.0.3.0 - Production on 星期四 4月 1 11:55:11 2004
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
连接到:
Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
PL/SQL Release 9.2.0.3.0 - Production
CORE 9.2.0.3.0 Production
TNS for Solaris: Version 9.2.0.3.0 - Production
NLSRTL Version 9.2.0.3.0 - Production
SQL> exit
从Oracle9i Enterprise Edition Release 9.2.0.3.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production中断开
bash-2.03$
在这里我们可以看到，使用spfile可以免去手工修改pfile文件的麻烦，减少了犯错的可能。
既然Oracle9i给我们提供了这个新特性，就值得我们学习使用它.
上一页 [1] [2] | 
