database

How to read XML database alert log?

Since Oracle 11g, Oracle maintains two copies of the database’s alertlog in ADR: a flat text file in the sub-directory trace and an XML like in the folder alert. I had a case recently at a customer where the log.xml was(…)

Migrating the Oracle 12cR1 sample schemas to PostgreSQL Plus Advanced Server 9.4

This post takes a look on how to migrate the Oracle 12cR1 sample schemas to PPAS 9.4 (PostgreSQL Plus Advanced Server 9.4). I’ll not dig into how to install PPAS as this was described in detail(…)

SQL Server 2016 CTP3.0: Stretch Database enhancements

Some months ago, my colleague Nathan explained you the bases of the new Stretch Database functionality via two blogs here and here. With the new SQL Server 2016 CTP 3.0, Stretch Database now includes new features and(…)

Trying AppDynamix – monitoring application from user to database

By Franck Pachot . I like to come upon new monitoring software that help to go quickly from user response time to root cause. And I love applications that can be installed easily and at which I can give a(…)

Instance fails to start automatically

Recently at a customer I was confronted with a problem of restarting the Oracle Database 12c automatically on a Windows Server 2008 R2 x64. I installed Oracle 12.1.0.1.0 with a user of service in a domain who has member(…)

Oracle 12c duplicate in cluster fails with ORA-65500

I had to perform a duplicate database between 2 ODAs and was always facing an ORA-65500 at the begin of the RMAN operation. Looking a bit deeper in the log outputs pointed me out that it was due to some(…)

Don’t use the default database file autogrow settings !

I often noticed default values for database file autogrow settings during my audits. You don’t trust me? Let me talk about a funny story about an incredible (and extreme) situation that concerns a transaction log file and its default settings.

statistics_level parameter

With Enterprise Manager Cloud Control 12c configuring and using the compliance standard utility allows us to discover events we should not have seen in other ways. Today at a customer’s site I discovered the following message:   The configuration(…)

SAP HANA SQL scripting optimization: the CE Functions

In SAP HANA, you have two possibilities to create the Calculated Views: Using the graphical method Using the scripting method with CE functions In this blog, I will demonstrate that CE Functions can improve performances from a Calculated(…)

Row Store vs Column Store in SAP HANA

The SAP HANA database allows you to create your tables in Row or Column Store mode. In this blog, I will demonstrate that each method has its advantages and disadvantages and should be used for specific cases. Thanks to two(…)