Database Administration & Monitoring

Migrating an Oracle instance to AWS Aurora – 3 – Data replication with AWS DMS

If you followed the last two posts in this little series (here and here) this is the current status of this demo migration project: We have converted the Oracle SH schema and(…)

Migrating an Oracle instance to AWS Aurora – 2– The AWS Schema Conversion Tool (SCT)

Having the required infrastructure ready now it is time to have a look at the AWS Schema Conversion Tool (SCT). The goal of this tool is to convert a source schema (Oracle(…)

Can I put my temporary tablespaces on a RAM disk with PostgreSQL?

The short answer to the title of this blog post is: yes, of course you can. The more important question is: should you? The PostgreSQL documentation about tablespaces contains an explicit warning: "Placing a tablespace on(…)

Migrating an Oracle instance to AWS Aurora – 1 – Setting up the base infrastructure

Migrating database to the cloud is a hot topic since a few years. As more and more of our customers are in the cloud, and some of them in AWS, migrating some of their Oracle databases(…)

AWS Automation – Stop a RDS instance

Introduction I created a RDS SQL Server instance on AWS. I use it for test purpose and to minimize the costs I needed to ensure that my instance is stopped automatically at the end of the working day and also(…)

DynamoDB: adding a Local covering index to reduce the cost

By Franck Pachot . This is a continuation on the previous post on DynamoDB: adding a Global Covering Index to reduce the cost. I have a DynamoDB partitioned on “MyKeyPart”,”MyKeySort” and I have many queries(…)

DynamoDB: adding a Global covering index to reduce the cost

By Franck Pachot . People often think of indexes as a way to optimize row filtering (“get item” faster and cheaper). But indexes are also about columns (“attribute projection”) like some kind of vertical partitioning. In relational (“SQL”) databases(…)

About temp_tablespaces in PostgreSQL

There often is a discussion if tablespaces should be used in PostgreSQL. People used to work with Oracle are often a bit surprised by this discussion as there is no way around using tablespaces in that technology. PostgreSQL does not(…)

Upgrading SUSE Linux Enterprise online

One really good feature from SUSE Linux Enterprise (SLE) is that it allows you to upgrade from your running system to a new service pack online. Let's say from SLE 12 SP3 to SLE 12 SP4. No new installation is(…)

Collations in PostgreSQL – basics

When you work with databases sooner or later you will need to get in touch witch collations. It might be that you never needed to think about it as initdb picked a(…)