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auto dbbak &

Mon, 05 Nov 2012 13:33:00 GMT

-- Database Back Scripts
-- dbbak.sql
run{
configure retention policy to redundancy 1;
backup as compressed backupset full database;
delete noprompt obsolete;
}

-- batch file
-- rmandb.bat
rman target sys/exigen nocatalog cmdfile=D:\app\Administrator\autobak\dbbak.sql log=D:\app\Administrator\autobak\dbbak.log append checksyntax

盐城��土�?/a> 2012-11-05 21:33 发表评论

RMAN - command & env option

Fri, 26 Oct 2012 02:12:00 GMT

RMAN Command:

backup
-- 备䆾整个数据�?/span>
backup database;
list
-- 列出所有的备䆾数据信息
list backup;
delete
change

-- 删除不再需要的备䆾�?/span>
RMAN> delete backupset 4;

分配的通道: ORA_DISK_1
通道 ORA_DISK_1: SID=9 讑֤��c�d��=DISK

备䆾片段列表
BP 关键�?nbsp; BS 关键�?nbsp; Pc# Cp# 状�?nbsp; 讑֤��c�d��D�名�U?br />------- ------- --- --- ----------- ----------- ----------
4 4 1 1 AVAILABLE DISK E:\ORCL_20121025_04NOKL8D_1_1.BAP

是否��定要删除以上对�?nbsp;(输入 YES �?nbsp;NO)?

-- 如果物理上直接删除一个备份文�Ӟ��则delete��p�|
RMAN-06207: 警告: �׃��状态不匚w��, 所以不能删�?nbsp;1 对象 (对于 DISK 通道)�?br />RMAN-06208: ��L�� CROSSCHECK 命��o修正状�?br />RMAN-06210: 不匹配对象的列表
RMAN-06211: ==========================
RMAN-06212: 对象�c�d�� 文�g�?/span>/句柄
RMAN-06213: --------------- ---------------------------------------------------
RMAN-06214: Backup Piece E:\ORCL_20121025_04NOKL8D_1_1.BAP

--�q�个时候需要change命��o
RMAN> change backupset 4 UNAVAILABLE;

不能使用更改的备份片�D?br />备䆾片段句柄=E:\ORCL_20121025_04NOKL8D_1_1.BAP RECID=4 STAMP=797594895
1 对象已更改�ؓ UNAVAILABLE 状�?br />

在状态�ؓAVAILABLE的情况下�Q�不可以删除备䆾集，需要优先将备䆾集更��CؓUNAVAILABLE�Q�才可以删除...

�?strong>快速闪回区的备份集�Q�不可以更新状态�ؓUNAVAILABLE�?/p>

-- 通过crosscheck可以��查备份集和备份片是否一��_��如果备䆾片被物理删除�Q�则Oracle会自动更新备份片状态�ؓ�Q�EXPIRED
RMAN> crosscheck backupset 2;

report
RMAN> report schema;

db_unique_name �?nbsp;ORCL 的数据库的数据库�Ҏ��报表

�怹�数据文�g列表
===========================
文�g大小 (MB) 表空�?nbsp;          回退�D�|��据文件名�U?br />---- -------- -------------------- ------- ------------------------
1    690      SYSTEM               ***     D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSTEM01.DBF
2    540      SYSAUX               ***     D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSAUX01.DBF
3    90       UNDOTBS1             ***     D:\APP\ADMINISTRATOR\ORADATA\ORCL\UNDOTBS01.DBF
4    5        USERS                ***     D:\APP\ADMINISTRATOR\ORADATA\ORCL\USERS01.DBF
5    50       sample               ***     D:\APP\ADMINISTRATOR\ORADATA\ORCL\SAMPLE.DBF

临时文�g列表
=======================
文�g大小 (MB) 表空�?nbsp;          最大大��?nbsp;(MB) 临时文�g名称
---- -------- -------------------- ----------- --------------------
1    29       TEMP                 32767       D:\APP\ADMINISTRATOR\ORADATA\ORCL\TEMP01.DBF

configure
-- 保留冗余备䆾�Q�默认�ؓ一�?/span>
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default

-- 不会删除以前的备份，只有在��用以下命令，才会删除以前的冗�?/span>
delete obsolete

-- 列出所有的obsolete文档
RMAN> report obsolete

-- 保留7个版本有效的
CONFIGURE RETENTION POLICY TO REDUNDANCY 7;

run{} �c�M��C语言 main{}
RMAN> run{
2> configure retention poilcy to redundancy 7;
3> backup as compressed backupset database;
4> delete noprompt obsolete;
5> }
script
RMAN> create script r1{
2> configure retention policy to redundancy 1;
3> backup as compressed backupset database;
4> delete noprompt obsolete;
5> }

已创��?nbsp;r1

-- 列出所有的脚本
RMAN> list script names;

恢复目录中存储脚本的列表

    目标数据�?nbsp;ORCL 的脚�?br />
       脚本�?br />       说明
       --------------------
       r1

-- 执行脚本 �Q�必��d��run的块中执行）
RMAN> run{
2> execute script r1;
3> }

-- 删除脚本
RMAN> delete script r1;

-- 打印/输出脚本
RMAN> print script r1;

正在打印存储的脚�? r1
{
configure retention policy to redundancy 1;
backup as compressed backupset database;
delete noprompt obsolete;
}

-- �~�辑脚本
-- 输出/打印脚本
RMAN> replace script r1 to file 'c:\a.txt';

-- =====�~�辑脚本======

-- 替换脚本
RMAN> replace script r1 from file 'c:\a.txt';

在nocatalog的时候，是无法创��本的�?/strong>

-- 保留备䆾�Q�一般按旉��计算 �Q�例如下面，更改保留�{�略为：保留备䆾两周旉��Q?/span>
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;

旧的 RMAN 配置参数:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1;
新的 RMAN 配置参数:
CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 14 DAYS;
已成功存储新�?nbsp;RMAN 配置参数
正在启动全部恢复目录�?nbsp;resync
完成全部 resync

-- 已经备䆾的归档日志，不再备䆾
backup archivelog all not backed up;

-- 直接用参�?nbsp;- 效果一�?/span>
CONFIGURE BACKUP OPTIMIZATION ON;

-- 使用�~�省�?/span>
CONFIGURE BACKUP OPTIMIZATION CLEAR;

-- 在多CPU的情况下�Q�可以多�q�程�q�行备䆾
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET;

allocate
{
configure retention policy to redundancy 1;
allocate channel c1 device type disk ;
allocate channel c2 device type disk ;
backup as compressed backupset full database;
release channel c1;
}

-- 备䆾镜像 - 如果在闪回恢复区�Q�是不支持多份镜像文件的
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1;

盐城��土�?/a> 2012-10-26 10:12 发表评论

RMAN - nocatalog & catalog

Wed, 24 Oct 2012 06:01:00 GMT
     摘要: nocatalogCode highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->C:\Users\Administrator>rman恢复��理�? Release 11.2.0.1.0 - Production ...  阅读全文

盐城��土�?/a> 2012-10-24 14:01 发表评论

Oracle 不完全恢�?- ctl - bak

Wed, 17 Oct 2012 13:59:00 GMT
不完全恢复：
resetlogs
using backup controlfile - 告诉Oracle�Q��用的controlfile是旧�?/li>
查询一个table所属的tablespace:
SQL> select tablespace_name from tabs where table_name = 'T';
TABLESPACE_NAME
------------------------------------------------------------
SYSTEM

SQL> startup nomount
ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance
ORACLE 例程已经启动�?br />
Total System Global Area 2137886720 bytes
Fixed Size                  2177456 bytes
Variable Size            1258292816 bytes
Database Buffers          872415232 bytes
Redo Buffers                5001216 bytes

SQL> alter database mount;
数据库已更改�?br />
SQL> select file#, checkpoint_change# from v$datafile;
     FILE# CHECKPOINT_CHANGE#
---------- ------------------
         1            1249453
         2            1249453
         3            1249453
         4            1249453
         5            1249453

SQL> select file#, checkpoint_change# from v$datafile_header;
     FILE# CHECKPOINT_CHANGE#
---------- ------------------
         1            1249453
         2            1249453
         3            1249453
         4            1249453
         5            1249453

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00264: no recovery required

SQL> recover database using backup controlfile;
ORA-00279: ?? 1249453 (? 10/17/2012 20:58:40 ??) ???? 1 ????
ORA-00289: ??:
D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_17\O1_MF_1_36_8
7XC8NM5_.ARC
ORA-00280: ?? 1249453 (???? 1) ??? #36 ?

指定日志: {<RET>=suggested | filename | AUTO | CANCEL}

ORA-00308: cannot open archived log
'D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_17\O1_MF_1_41_
%U_.ARC'
ORA-27041: unable to open file
OSD-04002: ????????????
O/S-Error: (OS 2) ??????????????????????

SQL> recover database using backup controlfile;
ORA-00279: ?? 1249853 (? 10/17/2012 21:06:30 ??) ???? 1 ????
ORA-00289: ??:
D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_17\O1_MF_1_41_%
U_.ARC
ORA-00280: ?? 1249853 (???? 1) ??? #41 ?

指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
D:\app\Administrator\oradata\orcl\REDO02.log
已应用的日志�?br />完成介质恢复�?br />
SQL> select file#, checkpoint_change# from v$datafile;
     FILE# CHECKPOINT_CHANGE#
---------- ------------------
         1            1250129
         2            1250129
         3            1250129
         4            1250129
         5            1250129

SQL> select file#, checkpoint_change# from v$datafile_header;
     FILE# CHECKPOINT_CHANGE#
---------- ------------------
         1            1250129
         2            1250129
         3            1250129
         4            1250129
         5            1250129
SQL> alter database open resetlogs;
数据库已更改�?/span>

恢复�Q�永�q�都是恢复的数据文�g�Q?/strong>
如果控制文�g损坏了，但是数据文�g没有损坏�Q�则在恢复的时候，仅仅��是验证数据文�g�Q�不会更改checkpoint_change#.

备䆾�Q?/span>
完全脱机备䆾 - shutdown - 现实环境中，shutdown危机无限
部分脱机备䆾 - offline - system �{�datafile无法offline备䆾
部分联机备䆾 - online - 会��生很多的log file
都需要物理的copy�Q�至于copy的file中有多少有用数据�Q�备份不兛_��?/p>
现实环境中，file可能GT�U�别�Q�copy会占用很多时间�?br />

盐城��土�?/a> 2012-10-17 21:59 发表评论

不完全恢�?- ctl - create - script

Mon, 15 Oct 2012 14:39:00 GMT
控制文�g
生成create 控制文�g的脚本�?br />
resetlogs / noresetlogs�Q�默认）
通过脚本创徏控制文�g�Q�会丢失很多信息�Q�归档日志信息等�Q?/li>
虽然丢失一部分信息�Q�但是有些还是可以注册回�ȝ��Q?br />
SQL> alter database register physical logfile '***';
-- 注明noresetlogs
SQL> alter database backup controlfile to trace noresetlogs;
数据库已更改�?br />
-- 没有注明noresetlogs�Q�则会生成两份脚本：一份是noresetlogs�Q�一份是resetlogs
SQL> alter database backup controlfile to trace as 'd:\control.txt';
数据库已更改�?br />

生成控制文�g的脚本信息：
-- The following are current System-scope REDO Log Archival related
-- parameters and can be included in the database initialization file.
--
-- LOG_ARCHIVE_DEST=''
-- LOG_ARCHIVE_DUPLEX_DEST=''
--
-- LOG_ARCHIVE_FORMAT=ARC%S_%R.%T
--
-- DB_UNIQUE_NAME="orcl"
--
-- LOG_ARCHIVE_CONFIG='SEND, RECEIVE, NODG_CONFIG'
-- LOG_ARCHIVE_MAX_PROCESSES=4
-- STANDBY_FILE_MANAGEMENT=MANUAL
-- STANDBY_ARCHIVE_DEST=%ORACLE_HOME%\RDBMS
-- FAL_CLIENT=''
-- FAL_SERVER=''
--
-- LOG_ARCHIVE_DEST_10='LOCATION=USE_DB_RECOVERY_FILE_DEST'
-- LOG_ARCHIVE_DEST_10='OPTIONAL REOPEN=300 NODELAY'
-- LOG_ARCHIVE_DEST_10='ARCH NOAFFIRM NOEXPEDITE NOVERIFY SYNC'
-- LOG_ARCHIVE_DEST_10='REGISTER NOALTERNATE NODEPENDENCY'
-- LOG_ARCHIVE_DEST_10='NOMAX_FAILURE NOQUOTA_SIZE NOQUOTA_USED NODB_UNIQUE_NAME'
-- LOG_ARCHIVE_DEST_10='VALID_FOR=(PRIMARY_ROLE,ONLINE_LOGFILES)'
-- LOG_ARCHIVE_DEST_STATE_10=ENABLE
--
-- LOG_ARCHIVE_DEST_1='LOCATION=D:\app\Administrator\flash_recovery_area'
-- LOG_ARCHIVE_DEST_1='OPTIONAL REOPEN=300 NODELAY'
-- LOG_ARCHIVE_DEST_1='ARCH NOAFFIRM NOEXPEDITE NOVERIFY SYNC'
-- LOG_ARCHIVE_DEST_1='REGISTER NOALTERNATE NODEPENDENCY'
-- LOG_ARCHIVE_DEST_1='NOMAX_FAILURE NOQUOTA_SIZE NOQUOTA_USED NODB_UNIQUE_NAME'
-- LOG_ARCHIVE_DEST_1='VALID_FOR=(PRIMARY_ROLE,ONLINE_LOGFILES)'
-- LOG_ARCHIVE_DEST_STATE_1=DEFER

--
-- Below are two sets of SQL statements, each of which creates a new
-- control file and uses it to open the database. The first set opens
-- the database with the NORESETLOGS option and should be used only if
-- the current versions of all online logs are available. The second
-- set opens the database with the RESETLOGS option and should be used
-- if online logs are unavailable.
-- The appropriate set of statements can be copied from the trace into
-- a script file, edited as necessary, and executed when there is a
-- need to re-create the control file.
--
--     Set #1. NORESETLOGS case
--
-- The following commands will create a new control file and use it
-- to open the database.
-- Data used by Recovery Manager will be lost.
-- Additional logs may be required for media recovery of offline
-- Use this only if the current versions of all online logs are
-- available.

-- After mounting the created controlfile, the following SQL
-- statement will place the database in the appropriate
-- protection mode:
--  ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE

STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS  ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO01.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 2 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO02.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 3 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO03.LOG'  SIZE 50M BLOCKSIZE 512
-- STANDBY LOGFILE

DATAFILE
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSTEM01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSAUX01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\UNDOTBS01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\USERS01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SAMPLE.DBF'
CHARACTER SET AL32UTF8
;

-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE 'D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_15\O1_MF_1_1_%U_.ARC';
-- ALTER DATABASE REGISTER LOGFILE 'D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_15\O1_MF_1_1_%U_.ARC';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE

-- All logs need archiving and a log switch is needed.
ALTER SYSTEM ARCHIVE LOG ALL;

-- Database can now be opened normally.
ALTER DATABASE OPEN;

-- Commands to add tempfiles to temporary tablespaces.
-- Online tempfiles have complete space information.
-- Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\TEMP01.DBF'
     SIZE 30408704  REUSE AUTOEXTEND ON NEXT 655360  MAXSIZE 32767M;
-- End of tempfile additions.
--
--     Set #2. RESETLOGS case
--
-- The following commands will create a new control file and use it
-- to open the database.
-- Data used by Recovery Manager will be lost.
-- The contents of online logs will be lost and all backups will
-- be invalidated. Use this only if online logs are damaged.

-- After mounting the created controlfile, the following SQL
-- statement will place the database in the appropriate
-- protection mode:
--  ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE

STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS  ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO01.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 2 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO02.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 3 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO03.LOG'  SIZE 50M BLOCKSIZE 512
-- STANDBY LOGFILE

DATAFILE
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSTEM01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SYSAUX01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\UNDOTBS01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\USERS01.DBF',
  'D:\APP\ADMINISTRATOR\ORADATA\ORCL\SAMPLE.DBF'
CHARACTER SET AL32UTF8
;

-- Commands to re-create incarnation table
-- Below log names MUST be changed to existing filenames on
-- disk. Any one log file from each branch can be used to
-- re-create incarnation records.
-- ALTER DATABASE REGISTER LOGFILE 'D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_15\O1_MF_1_1_%U_.ARC';
-- ALTER DATABASE REGISTER LOGFILE 'D:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2012_10_15\O1_MF_1_1_%U_.ARC';
-- Recovery is required if any of the datafiles are restored backups,
-- or if the last shutdown was not normal or immediate.
RECOVER DATABASE USING BACKUP CONTROLFILE

-- Database can now be opened zeroing the online logs.
ALTER DATABASE OPEN RESETLOGS;

-- Commands to add tempfiles to temporary tablespaces.
-- Online tempfiles have complete space information.
-- Other tempfiles may require adjustment.
ALTER TABLESPACE TEMP ADD TEMPFILE 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\TEMP01.DBF'
     SIZE 30408704  REUSE AUTOEXTEND ON NEXT 655360  MAXSIZE 32767M;
-- End of tempfile additions.
--

��Z��么，数据库知道，控制文�g的数量和位置呢？
-- 通过�pȝ��参数
SQL> show parameter control_files;
NAME                                 TYPE                   VALUE
------------------------------------ ---------------------- ------------------------------
control_files                        string                 D:\APP\ADMINISTRATOR\ORADATA\O
                                                            RCL\CONTROL01.CTL, D:\APP\ADMI
                                                            NISTRATOR\FLASH_RECOVERY_AREA\
                                                            ORCL\CONTROL02.CTL

盐城��土�?/a> 2012-10-15 22:39 发表评论

Oracle 11g 定位trace文�g

Mon, 15 Oct 2012 14:23:00 GMT

-- 查询数据库版�?/span>
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

-- 查询视图 v$diag_info
SQL> select * from v$diag_info;
   INST_ID NAME                 VALUE
---------- -------------------- --------------------------------------------------
         1 Diag Enabled         TRUE
         1 ADR Base             d:\app\administrator
         1 ADR Home             d:\app\administrator\diag\rdbms\orcl\orcl
         1 Diag Trace           d:\app\administrator\diag\rdbms\orcl\orcl\trace
         1 Diag Alert           d:\app\administrator\diag\rdbms\orcl\orcl\alert
         1 Diag Incident        d:\app\administrator\diag\rdbms\orcl\orcl\incident
         1 Diag Cdump           d:\app\administrator\diag\rdbms\orcl\orcl\cdump
         1 Health Monitor       d:\app\administrator\diag\rdbms\orcl\orcl\hm
         1 Default Trace File   d:\app\administrator\diag\rdbms\orcl\orcl\trace\or
                                cl_ora_5744.trc

   INST_ID NAME                 VALUE
---------- -------------------- --------------------------------------------------
         1 Active Problem Count 0
         1 Active Incident Coun 0
           t

-- 条�g查询视图 v$diag_info where name = ‘ v$diag_info’
SELECT value FROM v$diag_info WHERE name='Default Trace File';

-- 改变�pȝ�� sql_trace = true
SQL> alter system set sql_trace=true;
�pȝ��已更攏V�?br />
-- sql查询
SQL> select * from dual;
DU
--
X

-- 改变�pȝ�� sql_trace = false
SQL> alter system set sql_trace=false;
�pȝ��已更攏V�?br />
-- 查看trc文�g�Q�得到相关sql查询信息
=====================
PARSING IN CURSOR #16 len=18 dep=0 uid=0 oct=3 lid=0 tim=6209383360 hv=942515969 ad='7ff73f205f8' sqlid='a5ks9fhw2v9s1'
select * from dual
END OF STMT
PARSE #16:c=15600,e=34241,p=0,cr=3,cu=0,mis=1,r=0,dep=0,og=1,plh=272002086,tim=6209383358
EXEC #16:c=0,e=44,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,plh=272002086,tim=6209383572
FETCH #16:c=0,e=7916,p=2,cr=3,cu=0,mis=0,r=1,dep=0,og=1,plh=272002086,tim=6209391595
STAT #16 id=1 cnt=1 pid=0 pos=1 obj=116 op='TABLE ACCESS FULL DUAL (cr=3 pr=2 pw=0 time=0 us cost=2 size=2 card=1)'
FETCH #16:c=0,e=3,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=0,plh=272002086,tim=6209392413

*** 2012-10-15 22:17:48.640
CLOSE #16:c=0,e=49,dep=0,type=0,tim=6218121671
=====================

盐城��土�?/a> 2012-10-15 22:23 发表评论

不完全恢�?- redo损坏

Sun, 14 Oct 2012 15:06:00 GMT
     摘要: 恢复�Q?nbsp;   1. 完全恢复恢复的�v点Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->SQL> select file#,checkpoint_change# from v$...  阅读全文

盐城��土�?/a> 2012-10-14 23:06 发表评论

Oracle : v$statname & v$mystat 说明

Fri, 12 Oct 2012 07:03:00 GMT
v$statname 是对�l�计信息的说�?/strong>

STATISTIC#相当于编�?/div>

NAME��是�l�计量的名称

v$mystat是当前用��L��各种�l�计信息�l�果

sid��是session的id(也就是当前用�?
STATISTIC#��是�l�计量的�~�号(用来唯一��定�l�计量的名称)
value是统计量的�?
--得到当前拥护的SESSION ID
SQL> show user;
USER �?nbsp;"SYS"
SQL> select sid,username from v$session where username='SYS';

       SID USERNAME
---------- ------------------------------
        47 SYS

--查询需要的�l�计量名�U�和�~�号
SQL> select * from v$statname where name='redo size';

STATISTIC# NAME                                          CLASS    STAT_ID
---------- ---------------------------------------- ---------- ----------
       169 redo size                                         2 1236385760

--�Ҏ��上述�l�果,得到需要的�l�计�l�果
SQL> select a.statistic#, a.name, b.value from v$statname a, v$mystat b where a.
statistic# = b.statistic# and a.statistic#=169 and b.sid=47;

STATISTIC# NAME                                          VALUE
---------- ---------------------------------------- ----------
       169 redo size                                     10980

两个视图�?strong style="color: red;">STATISTIC#�q�接�Q�可以得到当前用��L��sid,�l�计量的�~�号,�l�计量的名称,和统计�?

盐城��土�?/a> 2012-10-12 15:03 发表评论

Oracle 物理备䆾的种�c�M��及完全恢�?

Thu, 11 Oct 2012 06:44:00 GMT
     摘要: 完全脱机备䆾�Q�冷备䆾�Q�（noarchivelog | archivelog�Q?优点�Q�安全缺点： OS Copy�Q�生产环境，数据文�g较大�Q�缺点：需要shutdown�Q�生产环境，风险较大�Q?部分脱机备䆾�Q�表�I�间tablespace offline�Q�相当于局部的shutdown�Q?�~�点�Q�OS Copy - 整个数据文�g的拷贝，没有解析出有效数据有些表�I�间无法offline - system, un...  阅读全文

盐城��土�?/a> 2012-10-11 14:44 发表评论