Author Archives: Ronny Egner

Oracle on linux – yes of course – but what linux?

Posted on October 19, 2009 by Ronny Egner

There is a discussion from December 2008 what Linux (SLES vs. Red vHat vs. Oracle Enterprise Linux) to use for running oracle on Linux by Yann Neuhaus. You can read his post here. After nearly one year i wanted to … Continue reading →

Posted in Oracle in general | 2 Comments

ORA-01555 (snapshot too old) error although undo_retention set to a high value

Posted on October 17, 2009 by Ronny Egner

The past week i had a argumentation with a colleague of mine on the behavior of the parameter undo_retention in 10g. He stated in 10g undo_retention determines the lower number of seconds oracle keeps the undo records. If there is … Continue reading →

Posted in Oracle in general | Leave a comment

11g Release 2 release rumors

Posted on October 16, 2009 by Ronny Egner

There are rumors on the release dates of 11.2.0.1.0 for different plattforms. According to my information the release dates are: Windows: second quarter 2010 Linux: already released (32-bit and 64-bit intel) HP-UX: 4th quarter 2009 Solaris: 4th quarter 2009 AIX … Continue reading →

Posted in Oracle in general | 1 Comment

Data Pump falsely reports the number of imported rows as 1 (one)

Posted on October 16, 2009 by Ronny Egner

Yesterday i did a large import using data pump and the network mode feature. I noticed a table containing a large number of rows were reported by data pump as imported but with only one (1) row. First i checked … Continue reading →

Posted in Oracle in general | 1 Comment

New public oracle yum server

Posted on October 15, 2009 by Ronny Egner

I just found a new public yum server hosted by oracle. This server can be used to install missing packages over the internet. It does not contain any security updates or bug fixes. The public yum server can be found … Continue reading →

Posted in Oracle in general | 3 Comments

Configuring a small DNS server for SCAN

Posted on October 15, 2009 by Ronny Egner

A few users asked what to do if there is no DNS server available for configuring the SCAN names when installing oracle grid infrastructure. Most asked if they can use hosts file entries. The short answer is: Nope. The grid … Continue reading →

Posted in Oracle in general | 28 Comments

ASM resilvering – or – how to recover your crashed cluster – Test no 4

Posted on October 13, 2009 by Ronny Egner

Test #4: Corrupting the ASM disk with ASM disk group being online and active After overwriting the ASM disk header while the disk group was offline we will now put some load on the full running cluster and corrupt the … Continue reading →

Posted in Oracle 11g Release 2, Oracle ASM | 3 Comments

The Oracle Database File System (DBFS)

Posted on October 8, 2009 by Ronny Egner

The following post is a summary of my tests with DBFS on a 11g Release 2 RAC. DBFS – An Overview Since the introduction of LOBs the database was used to store all kinds of files, for instance images, audio … Continue reading →

Posted in Oracle 11g Release 2, Oracle in general | 6 Comments

ORA-12157 TNS:internal network communication error when connecting after fresh installation

Posted on October 8, 2009 by Ronny Egner

Recently i came across a problem i thought was fixed since 10g: After a fresh installation of oracle 10g when trying to connect to the instance (for instance to create the database for the first time) you get the following … Continue reading →

Posted in Oracle in general | 1 Comment

ASM resilvering – or – how to recover your crashed cluster – Test no 3

Posted on October 8, 2009 by Ronny Egner

Test #3: Overwriting the ASM disk header with ASM disk group being offline In this post we will dig a little bit deeper with ASM. We will overwrite the ASM disk header on one disk while the disk group is … Continue reading →

Posted in Oracle in general | 8 Comments