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Oracle: an unexpected lock behavior with rollback

By Franck Pachot . Here is an odd Oracle behavior I observed when a transaction that acquired a lock is rolled back. Note that this is related to a specific combination of locks that should not be encountered in(…)

Documentum Multiple ADTS: Ratio of rendition creations between instances (Part 1)

I recently realized there are very few information about multiple ADTS instances installation and management. And we have a customer which has two ADTS running for one docbase. I therefore decided to write a couple of blog posts on “Multiple(…)

From 8.0 extended rowid to 12c pluggable db: Why Oracle Database is still a great software

By Franck Pachot . Do you know why Oracle Database is a leader in the database market since 30 years? Do you know any other software that is still the leading solution after decades? I think that it is(…)

SQL Server failover cluster, VSphere, & SCSI-3 reservation nightmares

When I have to install a virtualized SQL Server FCI at a customer place as an SQL Server consultant, the virtualized environment usally is ready. I guess this is the same for most part of the database consulting people.

Documentum upgrade project: from D2-Config 3.1 to D2-Config 4.1

During a migration from D2-Config 3.0 to D2-Config 4.1, we have encountered 2 issues. In order to have a clean installation and the insurance of being able to backup the configuration, we have decided to perform a(…)

What about ALTER INDEX … SHRINK SPACE ?

By Franck Pachot . I have recently published a script to check index fragmentation. But then, do you COALESCE or REBUILD? Well, there also is another option: ALTER INDEX SHRINK SPACE. Let’s compare all those index defragmentation operations.

Windows 10: The new features

First, it should have been Windows 9, but finally the new Microsoft operating system is named Windows 10! In the same way as for my blog post on Windows 8, I have decided to write a few words(…)

Documentum upgrade project: Configuring NTLM SSO for D2 3.1 SP1

The Documentum D2 3.1 SP1 release is kind of a mix between D2 4.1 APIs (using D2FS in backend) and D2 3.1 front-end. It needs SSO to be fully implemented and the configuration has to be applied for 3.1(…)

Oracle Cloud Control 12c: removing an agent is much easier in OEM 12.1.0.4

To remove an agent in the previous Oracle OEM Cloud Control 12c versions, you first had to delete its targets, stop the agent, and remove the host target. Only then were you able to remove the agent. In version 12.1.0.4,(…)

Oracle IOT: when to use Index Organized Tables

By Franck Pachot . When can we use IOT? That’s a question I had when giving recently the Oracle DBA essentials workshop. the DBA Essential is very dense and there is only half a day about performance. We(…)