Writing About Our Experiences With Oracle Databases
Thursday September 9th 2010

Latest Topics

Renaming Diskgroup containing Voting Disk and OCR

Recently encountered a issue where we had to rename a diskgroup for 11.2 RAC containing OCR and Voting Disk.At this [Read More]

Effect Of Multiple SHMMAX Settings

Last week I saw a warning message at database startup time saying: WARNING: EINVAL creating segment of size [Read More]

Finding blogging tough? Just copy and do find and replace

Finding blogging tough? Just copy and do find and replace

Well this is motto followed by Guenadi Jilevski for his blog http://gjilevski.wordpress.com and he seems to get result [Read More]

Physical Corruption: ORA-1578 part 3

Recently we encountered a block corruption issue in 10g database on Linux x86 64 bit and using ASM for storing database [Read More]

Cloning RAC Database with RMAN fails with error

Steps for cloning a RAC database  with RMAN is similar to cloning a single instance database. But while using rman [Read More]

‘oracle’ Archives

Installing 10.2.0.5 EM using software-only on 10.2.0.4/11g DB (GUI)

Installing 10.2.0.5 EM using software-only on 10.2.0.4/11g DB (GUI)

In this article , I will discuss how to install 10.2.0.5 EM Grid using 10.2.0.4 database. This method can also be used with 11g database.When you carry out 10.2.0.1 EM Grid control installation, it creates a 10.1.0.4 Database by default which is no longer supported and [Read More]

Mview Complete Refresh and Atomic_refresh parameter

This post discusses issue faced by me while working on Materialized view (mview) creation at new site(database). Starting Oracle 10g, how atomic_refresh works with complete refresh has undergone a change. Atomic_refresh parameter is to allow either all of the tasks of a [Read More]

CleanUp Temporary Segments Occupying Permanent Tablespace

There are situations when we see “temporary segments” in permanent tablespaces hanging around and not getting cleaned up. These temporary segments in permanent tablespace can be created by DDL operations like CTAS and “alter index..rebuild” because [Read More]

Generating Datapump Export Dump with Dumpfile name Containing Current Date and Time

Few days back I got a request from development team to generate hourly export dumps of few schemas. Following were the requirements: 1. Dumpfile name should contain current date and timestamp information. 2. The generated dumpfile should be moved to a specific location. 3. [Read More]

Link: Best practices for AIX RAC Database on OTN

A new whitepaper has been published on OTN which primarily discusses best practices for AIX 5.2,5.3 and 6.1 for RAC database for avoiding node eviction due to Oprocd.  It also mentions recommended AIX VMO parameters and recommended patches for Oracle RAC. You can find the [Read More]

Cloning database..Just do some Post checks !!

Well I will be covering some points which I believe should be part of post checklist for any cloned database environment. This might not be complete list as it contains point which I have encountered or heard of. 1) Change database Name and Database Id You should try to [Read More]

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Recent Comments

Lalit had this to say

Nice article. keep it up buddy. Read the post

Renaming Diskgroup containing Voting Disk/OCR | AskDba.org Weblog had this to say

had done similar activity on 11.2 Single instance having database files (see this post) using renamedg. We tried using Read the post

csk had this to say

In my case the adding Disk to an existing Disk Group failed as the disk was not visible from other RAC node.Now the Read the post

Saurabh Sood had this to say

Hi CSK, In this case, the information is already written into disk header, and to reuse the disk the only option i s Read the post

csk had this to say

Yeah. I have opened SR with Oracle. Once I get solution , I will provide it here. Read the post