Writing About Our Experiences With Oracle Databases
Sunday February 5th 2012

Latest Topics

11gR2:Listener Startup Issues

In this blog post I will be discussing listener startup issues faced in 11gR2 RAC. I will be constantly updating this [Read More]

Get Upgrading: Upgrade to Enterprise Manager Cloud Control 12c

Get Upgrading: Upgrade to Enterprise Manager Cloud Control 12c

This post describes the steps to upgrade an existing 11g Enterprise Manager Grid Control (11.1.0.1.0) to 12c [Read More]

Cluster SSH tool Utility

Cluster SSH tool Utility

Many times you come across scenario’s when you wish to open multiple ssh windows and execute same commands.e.g [Read More]

11g: Multiple failed login attempt can block New Application connections

In Oracle database 11g, a new feature/enhancement has potential of bringing down the application due to multiple [Read More]

Optimizer Choosing Nested-Loop Joins Instead of Hash-Joins

In one of my databases, one application query suddenly started to pick Nested-Loop joins instead of Hash-Joins and took [Read More]

Posts Tagged ‘ASM’

Oracle Database Appliance Introduced

Oracle has introduced it new product: ODA (Oracle Database Appliance) I was not able to join Oracle President Mark Hurd’s webcast where he supposed to announce a new Oracle product, now viewing this webcast HERE Kerry Osborne has shared information about this product, [Read More]

In-Place Upgrade 11gR2 RAC : 11.2.0.1 To 11.2.0.2

In-Place Upgrade 11gR2 RAC : 11.2.0.1 To 11.2.0.2

Sharing a post from my friend “Carthik” on 11gR2 RAC in-place upgrade. Overview ======== Starting oracle 11gR2 the Oracle database and Clusterware upgrades are done via the “Out of place upgrade”. And is the easier way to perform your upgrade. [Read More]

Adding a reinstalled/reimaged node back to 11gR2 Cluster

There could be a scenario of node crash due to OS/hardware issues and a reinstall/reimage of the same. In such cases, just a normal node addition would not  help since the OCR still contain the references of original node. We need to remove them first and then perform a [Read More]

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 moment we had not created database . I had done similar activity on 11.2 Single instance having database files (see this post) using renamedg. Therefore we [Read More]

How To Discover Disk Name When LUN Number is Known (OEL5)

I am creating 11gR2 RAC setup for one of my client. Following Oracle documentation for storage, I opted for Oracle ASM and asked storage team for new physical devices. Storage admin thus provided me with a set of LUNs instead of actual physical device names like [Read More]

11gR2: Steps to Rename ASM Diskgroup with DB files

11gR2 introduced renamedg utility to rename diskgroups. I would discuss renaming a diskgroup on a Standalone Grid Infrastructure installation with Oracle Restart. Before you use the command, ensure that ASM diskgroup is dismounted. Below is syntax for the command. You can [Read More]

11gR2 – SysAsm vs SysDba

SYSASM role was introduced in 11gR1 and was designed to administer ASM instances. In 11gR1 , if you connected with SYSDBA role , you used to get a warning which was only recorded in alert log (Refer to my earlier post here). But things have changed in 11gR2. While trying to [Read More]

Link:11gR2 RAC installation steps on OEL4

If you are looking for steps for 11gR2 RAC installation, you can refer to this article by Rajeev Ramdas at Dbastreet.com. Article lists down steps for installing 11gR2 RAC on 64 bit Oracle Enterprise Linux 4 (OEL4) using ASM for storage. As Raw devices are no longer [Read More]

Get Upgrading: Steps To Upgrade To 11gR2

Get Upgrading: Steps To Upgrade To 11gR2

As 11gR2 is out for Linux, I decided to upgrade one of my existing 10.2.0.3 database to 11.2.0.1 to get the look and feel of 11gR2. Direct upgrade to 11gR2 is supported from 9.2.0.8 or higher, 10.1.0.5 or higher, 10.2.0.2 or higher and 11.1.0.6 or higher. If you have a [Read More]

11gR2 Database Installation with ASM on OEL5

11gR2 Database Installation with ASM on OEL5

I will be listing down steps for 11g Release 2 installation on Linux x86. There has been few changes incorporated in 11gR2 which must be given due consideration before starting installation. ASM instance now runs from new Oracle Home called Grid Infrastructure. If you wish [Read More]

ORA-1078 ORA-1565 Errors while starting database with SPFILE on ASM

I was getting following error’s while starting a database using spfile on ASM. Actually this was a cloned RAC environment. SQL> create SPFILE='+ASM_GROUP/PORTALDB/spfileportaldb.ora' from pfile; File created. SQL> shut immediate; ORA-01109: database [Read More]

Creating ASM devices on AIX

I thought of sharing few tips on creating ASM devices on AIX which I will be helpful to Oracle DBA’s. Suppose SysAdmin gives you list of Serial numbers for LUN instead of device Name pcmpath query device DEV#: 33 DEVICE NAME: hdisk33 TYPE: 2107900 ALGORITHM: Load [Read More]

Creating Oracle Extended RAC on Oracle VM

Yesterday, I found one very useful article at OTN “Creating Oracle Extended RAC” on completely virtual environment using Oracle VM. As Virtualization is becoming popular day by day and is very cost effective, one must know how to use this to simulate actual [Read More]

Question:Sizing ASM LUN

We received following question from Mr Orlando through our Contact Page How about a discussion on how to size our LUNS to use with ASM. For instance we have a Dell MD3000 with 44x300GB HDDs (protected by RAID-10) and we’re planning to create LUNs of 2TB on the [Read More]

Raw Devices to be deprecated in 12G

I was browsing through the OraNA.info posts and found an interesting post from Steve Karam which referred to a metalink Note:578455.1 – Announcement of De-Support of RAW devices in Release 12G If you go through the note, it mentions desupport of Raw devices from [Read More]

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Recent Comments

Saurabh Sood had this to say

Hi Pawan, We cannot force the writes to a specific disk. At least I am not aware of any such thing. Oracle will Read the post

Amit had this to say

hi Pawan, ASM_PREFERRED_READ_FAILURE_GROUPS is mainly used for RAC instances and that too stretch clusters i.e when Read the post

PAWAN had this to say

HI, i am newbie.... please guide me! My manager asked me to configure ASM in 11g with single instance Read the post

PAWAN had this to say

HI, i am newbie.... please guide me! My manager asked me to configure ASM in 11g with single instance Read the post

Saurabh Sood had this to say

@Ganesh: The global stats were up-to-date for both the databases, though I did not check the col stats. But the Read the post