Oracle10g的AWR性能优化工具介绍
AWR(Automatic Workload Repository)是Oracle 10g新提供的收集数据库统计信息的工具。它主要包括AWR内存区, 历史数据存储文件和ASH等部件。AWR报告的主要内容包括以下几部分,前言部分: 这是AWR报告的第...
新车、磨合驾驶必读
新车磨合期,是指新车出厂后,初次行驶一段距离以使引擎各个部件磨合顺畅的时期。 新车的磨合里程一般为1000公里—3000公里,在此阶段需要注意: 一忌:高速行驶 新车初驶阶段都有速度规定,国产车一般规...
Oracle System Change Number (SCN) Number 完全笔记
SCN是當Oracle資料更新後,由DBMS自動維護去累積遞增的一個數字。 當一個交易commit時,LGWR會將log buffer寫入redo log file,同時也會將該筆交易的 SCN同步寫入到redo log file內(wait-until-completed)。因此當你...
Oracle数据库的几种启动和关闭方式
有以下几种启动方式:1、startup nomount 非安装启动,这种方式启动下可执行:重建控制文件、重建数据库 读取init.ora文件,启动instance,即启动SGA和后台进程,这种启动只需要init.ora文件。 2、startup mount...
scn与控制文件,数据文件
scn与控制文件,数据文件变化的关系。
Systemwide Tuning using STATSPACK Reports
Doc ID: Note:228913.1Type: BULLETIN Last Revision Date: 13-FEB-2003Status: PUBLISHEDSystemwide Tuning using StatsPack ReportsPURPOSE This article is a reference to understand the output generated by ...
Problem: 10.2 Agent Install On Rac Fails With 'Exceptionmessage=Prkc-1002'
In this Document Symptoms Cause SolutionThis document is being delivered to you via Oracle Support's Rapid Visibility (RaV) Rapid Visibility (RaV) process, and therefore has not been subject to an independent technical review.Applies to: Enterprise Manager Grid Control - Version: 10.2.0.1.0This problem can occur on any platform.2 node RAC Cluster version 10.2.0.2 on RHEL4 AS x86_64 (AMD64). SymptomsTrying to install 10.2.0.1 agent installation fails during Configuration Assistant with "E
Problem: 10.2 Agent Install On Rac Fails With 'Exceptionmessage=Prkc-1002'
In this Document Symptoms Cause SolutionThis document is being delivered to you via Oracle Support's Rapid Visibility (RaV) Rapid Visibility (RaV) process, and therefore has not been subject to an ...
oracle imp字符集问题的解决
问题: 在imp一个dmp文件的时候,提示不支持要求的字符集转换(从类型850到852). 原理: ORACLE多国语言设置是为了支持世界范围的语言与字符集,一般对语言提示,货币形式,排序方式和CHAR,VARCHAR2...
Linux AS3.0+Oracle9.2.0.7 RAC Listener.ora, tnsnames.ora,spfileSID.ora文件设置
RAC 的hosts 设置 : rac1 , rac2 代码:--------------------------------------------------------------------------------DELL-RAC02</etc>$cat hosts# Do not remove the following line, or various programs#...
Oracle RAC Load Balance , Fail Over测试
配置server端的tnsnames.ora,首先来看各实例的remote_listener和local_listener情况: rac1:SQL> show parameter listenerNAME TYPE VALUE------------------------------------ ----------- -----------------------...
各个Oracle 版本下如何调整高水位(HWM)
个人总结整理 , 转载请注明出处。以下没有注明版本号的各版本都适用。1.CTAS :create table xxx_newtablespace new_tablespace_namestorage (initial new_initial next new_next freelists new_freelist_number )a...
control_file_record_keep_time 对RMAN备份的影响以及是否影响热备份
RMAN: 如果用rman采用nocatalog备份的话,其备份信息保存在control file中,保存的时长等于control_file_record_keep_time的值 --------------------------- 对于热备份 (热备的信息应该是写在控制文件中的?) :...
ORA-01679: database must be mounted EXCLUSIVE and not open to activate
Subject: ORA-01679 When Activating the Standby Database Doc ID: Note:123133.1Type: PROBLEM Last Revision Date: 04-MAY-2004Status: PUBLISHEDProblem Description-------------------You try to activate...
Configuration of Load Balancing and Transparent Application Failover
Subject: Configuration of Load Balancing and Transparent Application Failover Doc ID: Note:226880.1Type: BULLETIN Last Revision Date: 27-JUL-2005Status: PUBLISHEDConfiguration of Load Balancing and T...
CONTROL_FILE_RECORD_KEEP_TIME & MAXLOGHISTORY
metalink对于control_file_record_keep_time的解释:CONTROL_FILE_RECORD_KEEP_TIME specifies the minimum number of daysbefore a reusable record in the control file can be reused. In the event a new recor...
Control File中备份信息被覆盖情况下的数据库恢复案例 (zt)
http://blog.csdn.net/kamus/archive/2005/01/17/257094.aspx 现场人员报告说误删除了用户(drop user),按照操作文档作RMAN的不完全恢复,但是报错,错误信息显示:RMAN-03002: failure during compilation of c...
省油与安全行车
油价和房价一样,不要指望会有下跌的可能,能省一点是一点,首先要在思想上明确6不(搞得跟领导做报告似的) 1首先,要做到六不:就是不虚荣—微型车够用就好 2不逞强—爬坡时不硬撑 3 不娇气—低速不开空调 ...
Oralce Trigger Before以及After 的差別
我想大概有些寫trigger的人會遇上這個問題..尤其是沒有師父指導..得自己瞎子摸象我花了點時間把這個問題給理清楚希望將來寫oracle trigger的人別犯跟我一樣的錯誤 . BEFORE Specify BEFORE to cause the database ...
Oracle Custom Support Identifier(CSI)
.A valid Custom Support Identifier(CSI) is required to create a MetaLinkaccount. A unique CSI number is usually issued for each Oracle product that is purchased.