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Note: All the posts are based on practical approach avoiding lengthy theory. All have been tested on some development servers. Please don’t test any post on production servers until you are sure.

Sunday, December 30, 2012

Oracle Database 12c: Are you ready?

What is 12c Database?
Oracle Database 12c is the next release of Oracle’s flagship database product, expected to be launched in calendar Q1, 2013. Because it is  not yet officially launched to general availability , information about it, is limited. following are the information I could manage to gather from various sources, 100% authenticity is not guaranteed until the product is released officially.

Thursday, December 20, 2012

ORA 1775 looping chain of synonyms

There can be multiple reasons for this error.

1- Through a series of CREATE synonym statements, a synonym was defined that referred
to itself.

Recompiling Invalid Objects

Operations such as upgrades, patches and DDL changes can invalidate schema objects. 
These objects are re-validated by on-demand automatic recompilation if they don't have compilation errors. But it may take a significant time, so it is always better to make them compiled before they are called.

Monday, December 17, 2012

Import fails with IMP0098: Checking integrity of dump file

After the export is finished one should always check if the export dump file is corrupted on thesource machine using imp with "show=y". If getting the errors then the file is corrupted on the source machine.

Monday, December 03, 2012

RMAN: Incomplete Recovery from TAPE to Single Instance

Environment: Windows 2008R2 64bit, backup located at Netbackup (Tape media), DB is RAC one with two nodes on ASM.

Saturday, December 01, 2012

Installing TimesTen 11gR2 - Windows

On UNIX, you can install multiple instances of TimesTen. On Windows, you can
install only one instance of any major TimesTen release where a major release is indicated by the first three parts of the release number, such as 11.2.2. For example, you can install both and on the same Windows computer, but you cannot install both and

Oracle TimesTen - Intro

TimesTen - What is it? 
 TimesTen is a memory-optimized, relational database management system with persistence and recover ability. Unlike traditional disk-optimized relational databases, all data within a TimesTen database is located in physical memory (RAM), which means no disk I/O is required for any data operation.