How to mount CD-ROM in Linux using CLI
Just wanted to share with you steps to mount CD-ROM in Linux without having GUI. First of all, you should check /mnt and /media folders and see if it has already been mounted. If it’s not, then you...
View ArticleUsing scp with nohup command without providing password
It seems almost impossible for me to use scp from command line with nohup and without providing password. I didn’t want to share authentication keys between servers using ssh-keygen, which seemed to be...
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Oracle Enterprise Manager 12c Cloud Control – new book
My friend and former ACE Director Porus Homi Havewala’s new book on Oracle Enterprise Manager 12c Cloud Control, is now available, this is the First published EM 12c Cloud Control book in the world. If...
View ArticleTesting Load balancing in Oracle RAC
If you’ve installed Oracle RAC (Real Application Clusters) and want to test how Load Balancing works, you can run the following shell script and check GV$SESSION view: #!/bin/bash ....
View ArticleSome processes are missing from V$SESSION view
Today, while checking both V$PROCESS and V$SESSION view, I realized that there’re some processes that are missing from V$SESSION view: SQL> select count(*) from v$process where addr not in (select...
View ArticleWaiting at “Performing remote operations” during RAC installation
Today, while installing RAC, the installation began to wait at “Performing remote operations” step. I’ve tried to check log files, but there was no information written Then I tried to trace the...
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Debugging Data Pump session
While importing a dump file, sometimes it takes too long and seems to be “hanging” and processing something unknown in the background, or queuing for something. As a DBA, you HAVE NOT wait “until it...
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Step by Step Oracle 10g RAC installation ebook
From the following link you can download my Step by Step Oracle 10g RAC installation on VMware ebook Downloaded 172 times
View ArticleTT0802: Database permanent space exhausted (TimesTen db)
During TimesTen stress test, we’ve encountered the following error while trying to perform bulk insert : TT0802: Database permanent space exhausted — file “blk.c”, lineno 3477, procedure “sbBlkAlloc”"...
View ArticleMoving RAC redolog files to the new ASM diskgroup
Here’re the steps you need to perform in order to move redo log files to the different ASM diskgroup in a RAC environment First of all, make sure you’ve been provided shared disks by system...
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Step by step video tutorial of installing Oracle Database 12c on OEL 6
In this video tutorial you’ll learn how to install Oracle Database 12c on Oracle Enterprise Linux 6 You can download .mp4 format of the video from this link You can watch it online from this link...
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I’m Oracle Certified Master now!
Last week I got an email from Oracle Certification Team that I’ve successfully passed OCM exam. I can proudly say that I’m Oracle Certified Master now! Although I’m working as a production DBA, I...
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Peer not authenticated – OEM error
Some days ago I was requested to deploy 9i database to 10g Grid Control. According to compatibility matrix (check metalink note - Oracle Enterprise Manager Grid Control Certification Checker (Doc ID...
View ArticleUser equivalence check failed for user “oracle”.
If you’ve installed and configured RAC environment, you should face “User equivalenece check” error during pre-requisite check There’re three common reasons for getting this error: - You didn’t...
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How to become an Oracle Certified Master (My OCM journey)
This is it! Finally I’ve successfully passed OCM exam. It was almost more than 1 year that I’ve been preparing for this it. It’s almost impossible to find additional information about the exam online,...
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My book is published!
My book is out! I would like to announce to all my fellow DBA friends that my book is published and is available at Amazon. http://www.amazon.com/Oracle-Backup-Recovery-secrets-In-Focus/dp/0984428232/...
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I’m RACAttack Ninja!
I’m proud to announce that I’m one of the 10 RAC Attack Ninjas this year! If you’re attending OOW13, don’t forget to come and say “hi” to Ninjas. We’ll be at OTN Lounge in the lobby of Moscone South on...
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Step by Step Installing Oracle 12c RAC on VirtualBox – Video Tutorial
It’s 3.50 AM at San Francisco and I’m finalizing a new video tutorial that I have been creating for the users who will attend RAC Attack at Oracle Openworld 2013 (Ninja Operation). Tomorrow is the...
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V$ASM_DISKGROUP displays information from the header of ASM disks
While playing with OCR recovery, suddenly I realized that V$ASM_DISKGROUP view gets information from the headers of the ASM disk files that are specified at *.ASM_DISKSTRING parameter. Here’s the...
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How to configure Enterprise Manager 11gR2 for RAC environment
After migrating 10gR2 single instance to 11gR2 RAC db, the next step should be configuring Enterprise Manager (if you don’t use centralized Grid Control) It can be done by a simple command. But as...
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