实验环境:OEL 5.7 + Oracle 10.2.0.5 Tips:该参数仅在特殊恢复场景下使用,需要在专业Oracle工程师指导下进行操作. 1.隐藏参数说明 2.故障场景再现 3.非常规恢复 1.隐藏参数说明 查询隐藏参数"_allow_resetlogs_corruption"及说明: set linesize 333 col name for a35 col description for a66 col value for a30 SELECT i.ksppinm nam…
一.ORA-00600[2662]问题模拟及解决方法 这是2013年的一篇文章,也不知道数据库是什么版本, 我的数据库时11.2.0.4,使用下面方法模拟的时候,模拟不出来.... 参照eygle的相关技术blog,测试下_disable_logging将对数据库产生的影响,由于是隐含参数,所以我们通过如下方法获取对这个参数的描述:SQL> select ksppinm,ksppdesc from x$ksppi where ksppinm like '%logging'; KSPPIN…
ORA ] 错误解析 ERROR: Format: ORA ] [a] [b] VERSIONS: versions 6.0 to 12.1 DESCRIPTION: A mismatch has been detected between Redo records and Rollback (Undo) records. We are validating the Undo block sequence number in the undo block against the Redo blo…
在数据库服务器异常断电重启后,数据库会进行实例恢复,那么实例恢复的过程中Oracle做了什么操作呢?参考官网在这里做一下解释,菜鸟水平有限,欢迎勘正. 首先说下实例恢复的定义: Instance recovery is the process of applying records in the online redo log to data files to reconstruct changes made after the most recent checkpoint. Instance…
一,建立测试环境 01,一个oracle数据库环境 02,具体数据库实验环境配置 SQL> create user test1 identified by kingle; User created. SQL> grant dba to test1; Grant succeeded. SQL> create tablespace ttt1 datafile '/u01/app/oracle/oradata/oracle01/test101.dbf' size 10M; Tablespace…
综述 SQL> set pages 100 lines 200 col result for a15 col OPERATION_TIMESTAMP for a35 col HOST_NAME for a15 col DB_NAME for a15 SQL> @check_ext_scn no rows selected Database 2: SQL> select current_scn from v$database; CURRENT_SCN -------…
https://berxblog.blogspot.com/2015/01/oradebug-doc-12102.html this is just an online docu of ORADEBUG DOC in 12.1.0.2.The general comments from Tanel Poder apply to this version as well. SQL> oradebug doc Internal Documentation *******************…
环境:11.2.0.4.0 升 11.2.0.4.8 后测试 背景:oracle 的db_link会导致实例间SCN同步,SCN增长速度过快则会产生错误: 方案:oracle官方推荐升级版本,但升级之后该问题依然存在. 新创建orcl11g库-------------------------------------------------------SQL> alter user scott identified by tiger account unlock;SQL> grant creat…
1.创建表dept1: :: SCOTT@ORA11GR2>create table dept1 as select * from dept; Table created. :: SCOTT@ORA11GR2>select * from dept1; DEPTNO DNAME LOC ---------- -------------- ------------- ACCOUNTING NEW YORK RESEARCH DALLAS SALES CHICAGO OPERATIONS BOSTO…