Monthly Archives: October 2009

How to copy schema stats from one schema to another schema

Posted on October 30, 2009 by Ronny Egner

The following post is a short description how to copy schema statistics from one schema to another. Basically there are two methods for doing this: using DBMS_STATS or using Data Pump This is especially useful when doing large data transfers … Continue reading →

Posted in Oracle in general | 8 Comments

Calculate required kernel parameters for running Oracle 11g Release 2 on Linux

Posted on October 28, 2009 by Ronny Egner

The following is a short guide on how to calculate the required kernel parameters for running Oracle 11g Release 2 database on Linux. In addition to that i add some parameters recommended by myself. Note that for running Oracle Grid … Continue reading →

Posted in Oracle 11g Release 2, Oracle in general | 4 Comments

ASM resilvering – or – how to recover your crashed cluster

Posted on October 27, 2009 by Ronny Egner

In this and the following posts i will perform some crash and recover scenarios and show how to recover the cluster successfully. At the moment the following tests are planned and will be published during the next days: suddenly turning … Continue reading →

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

ASM resilvering – or – how to recover your crashed cluster – Test no 5

Posted on October 27, 2009 by Ronny Egner

In this post we will reproduce a more common scenario: We will forcefully remove the asm disk device from the operating system. This simulates common errors like a crashed storage system or some kind of interrupted connectivity (cable plugged, power … Continue reading →

Posted in Oracle in general | 3 Comments

New Server

Posted on October 26, 2009 by Ronny Egner

As you might have noticed the Blog moved to a new server. This is a dedicated server so that i am able to install plugins, modify the layout and do much more (like hosting files different than images and documents). … Continue reading →

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Backing up your system configuration

Posted on October 21, 2009 by Ronny Egner

When backing up servers with any kind of backup software you will most certainly backup your data. But how about the system configuration? When restoring a system from scratch do you know how big the disks were, what partition sizes, … Continue reading →

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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 →

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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