metalink-Oracle Clusterware and RAC Support for RDS Over Infiniband
In this DocumentPurposeDetails Terms IPOIB RDS Architectur...
Migrate database to Exadata with DBMS_FILE_TRANSFER
目前正在执行数据库迁移业务,将移动的数据库从IBM小鸡迁移到X86 Server SAN的服务器,迁移方法参考metalink的文档,值得借鉴和学习。实际迁移step-step详细步骤和中间过程待迁移完成之后再补上。In this DocumentGoalSolution...
Large result cache can cause sessions to spin -instance to hang
Oracle Real Application Clusters (RAC) is a clustered database solution that provides scalability and availability for business continuum. “Scalability” is a relative term and is based on a simple rule that as the number of user’s accessing the system increases, the RAC configuration should be ...
Listener in INTERMEDIATE status with "Not All Endpoints Registered
In this DocumentSymptomsCauseSolutionReferencesApplies to: Oracle Server - Enterprise Edition...
crsctl start/stop crs and crsctl start/stop cluster 区别
1 crsctl start/stop crs 是单节管理 crsctl start/stop cluster [-all 所有节点] 可以管理多个节点 2 crsctl start/stop crs 管理crs 包含进程 OHASD crsctl start/stop cluster ...
ora 15181 symbol odm_mkdir not found
Linux x86_64 两台数据库节点RAC 11.2.0.4版本。dbca创建数据库报错:ora 15181 symbol odm_mkdir not found参考文档:Can't Relink ODM library After Upgrade To 11.2.0.4: ORA-15181: symbol [odm_mkdir] not found in library odm library. (文档 ID 1608033.1)打上补丁18180390 即可...
11gR2 Clusterware and Grid Home - What You Need to Know(from metalink)
In this DocumentPurposeScopeDetails 11gR2 Clusterware Key Facts Clusterware Startup Sequence...
How to restore ASM based OCR after complete loss of the CRS diskgroup
转过来看看,真实的情况应该比这个要复杂How to restore ASM based OCR after complete loss of the CRS diskgroup on Linux/Unix systems In this DocumentGoalSolutionApplies to:Oracle Database - Enterprise Edition - ...
DataGuard broker之一:DataGuard broker简介
看了下DataGuard broker,感觉不错,测试后考虑是否在生产环境中进行配置。[@more@]The Data Guard broker 是一个分布式管理管理架构用于自动创建、维护和监视dataguard配置。你可以使用OEM(图像化界面)或者DGMGRL(命令行方式)进行以下操作:1。创建和激活dataguard配置,包括设置redo transport services and log apply services2。可以在任何系统管理这个配置中的整个dataguard配置(所有的主库和备库)3。管理和监视包含RAC primary或standby数据库的dataguard配置4。简化角色切换操作,只要DGMGRL的一条命令或者OEM的一个按钮就可以进行
使用可传输表空间向rac环境迁移数据
可传输表空间,是一种快速的转移数据的方式,基本过程如下:1、检查表空间的自包含性2、使用exp(expdp)导出表空间的元数据,这个过程很快3、将表空间置于read only模式,防止数据写入4、将包含元数据的dmp文件和表空间数据文件拷贝到目标库上5、使用imp(imdp)导入到元数据例子中说明了,如何使用可传输表空间向rac环境迁移数据.[@more@]可传输表空间,是一种快速的转移数据的方式,基本过程如下:1、检查表空间的自包含性2、使用exp(expdp)导出表空间的元数据,这个过程很快3、将表空间置于read only模式,防止数据写入4、将包含元数据的dmp文件和表
ORACLE压力测试工具SwingBench的配置过程
ORACLE压力测试工具SwingBench的配置过程1描述什么是SwingBench(简介部分为转载-http://www.open-open.com/lib/view/open1347625827101.html):这是Oracle UK的一个员工在一个被抛弃的项目的基础...
【RAC】Oracle RAC环境的日志体系
在Oracle RAC环境中比单个系统的日志体系要复杂:见下图:简单介绍一下有关Oracle集群环境中日志体系结构,在遇到问题时,可以快速查找所需的日志文件,及时的定位问题~1.Oracle集群日志的文件路径Oracle集群涉及的...
high wait for
在测试数据库的awr报告中发现大量的 dfs lock handle,引出这个文档作为参考25个并发,每个并发持续执行一个并行度为24的查询sql,在等待事件中 列出了等待时间最长的dfs lock handleAPPLIES TO:Oracle Database - Enterprise Edition - Version 11.1.0.6 to 12.1.0.2B1 [Release 11.1 to 12.1]Information in this...
Why Is My Query Using a High Value for Degree of Parallelism
APPLIES TO:Oracle Database - Enterprise Edition - Version 9.2.0.1 and laterInformation in this document applies to any platform.GOALYou want to know why the parallel execution of your SQL statement is using a high value for degree of parallelism (DOP). SOLUTIONFactors that ...
There is Wait on Resmgr:pq Queued Permanently (文档 ID 1503339.1)
APPLIES TO:Oracle Database - Enterprise Edition - Version 11.2.0.3 and laterInformation in this document applies to any platform.SYMPTOMSAfter upgrade to 11.2.0.3, we see wait event resmgr:pq queued permanently.CAUSE Not enough parallel slaves available.SOLUTIONIncre...
monitor PX limits from Resource Manager for active sessions (文档 ID 240877.1)
DescriptionIt shows the parallel degree limit from resource manager for all connect users.Degrees of 0 or 1 mean that the query is running in serial.Example output SID SERIAL# USERNAME PLAN RESOURCE_CONSUMER_GROUP PARALLEL_DEGREE_LIMIT_P1 --- -----...
RAC创建ASM单个磁盘不能操作2T
安装问题2:ASM单个磁盘不能操作2T bootinfo –s hdisk8 移除已经创建好的数据库,删除asm卷组及磁盘: p7402:/home/oracle$export ORACLE_SID=+ASM2 p7402:/home/oracle$sqlplus / as sysdba SQL> select instance_name from v$instance; INSTANCE_NAME -------------------------------- +ASM2 SQL> s...
Setup, Monitor, And Tune Parallelism In The Database (文档 ID 1549214.1)
In this DocumentPurposeScopeDetails What is parallelism best used for? When and when not to Implement Parallel Execution...
monitor PX limits from Resource Manager for active sessions (文档 ID 240877.1)
DescriptionIt shows the parallel degree limit from resource manager for all connect users.Degrees of 0 or 1 mean that the query is running in serial.Example output SID SERIAL# USERNAME PLAN RESOURCE_CONSUMER_GROUP PARALLEL_DEGREE_LIMIT_P1 --- -----...
Automatic Degree of Parallelism in 11.2.0.2 (文档 ID 1269321.1)
背景是在某项目进行POC测试的时候,将数据加载和翻倍之后,客户提供了一个大查询SQL,涉及署数据量2T左右,客户的SQL不允许修改、建立索引等调优,只能直接跑在三节点组成的RAC集群上,我们私下加上hint 开启64并发,跑出来的结果是10分钟左右;不加hint,不进行IO校准,同样的SQL跑了1个半小时,而且负载只在一个节点上...