Database Administration & Monitoring

How SQL Server MVCC compares to Oracle and PostgreSQL

By Franck Pachot . Microsoft SQL Server has implemented MVCC in 2005, which has been proven to be the best approach for transaction isolation (the I in ACID) in OLTP. But are you sure that writers do not block readers(…)

NVMe the afterburner for your database

Over 1 million IOPS (@8 KByte) and more than 26 GByte/s (@1MByte): Read more to see all impressive benchmark figures from a server with 14 NVMe drives and read why this is still not the best you could get...

Should I go for ODA 19.5 or should I wait until 19.6?

Introduction As you may know, Oracle Database 19c is available for new (X8-2) or older Oracle Database Appliances since several weeks. Current version is 19.5. But when you go to the official ODA documentation , it(…)

EDB PEM – Monitor your Postgres cluster

In my last post, I explained, how to setup a HA Postgres Cluster using EDB Postgres Advanced Server and Failover Manager. As a next step, we want to install the EDB Postgres Enterprise Manager to monitor what we setup before.

Setup a two node Postgres HA Cluster using EDB Advanced Server and EFM

Some time ago I had a customer looking for a two node PostgreSQL Master/Replica solution. As we need Oracle compatibility in a later step, we decided to go with the EnterpriseDB tools. This article should give you an introduction on(…)

SQL Server Tips: Path of the default trace file is null

In addition of my precedent blog about this subject “SQL Server Tips: Default trace enabled but no file is active…”, I add a new case where the default path of the trace file was empty. The(…)

Adding PostgreSQL extensions without being super user?

Usually, when you need to install a PostgreSQL extension you do this as superuser (or at least I am doing it like this). The downside of that is, of course, that a super user must be available once a new(…)

Make Oracle database simple again!

Introduction Let’s have a look at how to make Oracle database as simple as it was before. Oracle database is a great piece of software, yes it’s quite expensive, but it’s still the reference and most of the companies can(…)

One day training @ Microsoft Azure Cloud Workshop

Today, with my colleague Christophe, we follow the Microsoft Azure Training Day: Data and Analytics @ Microsoft Zürich (Wallisellen to be exact). After a presentation of SQL Server 2019, we begin with the First Lab about(…)

SQL Server Tips: Orphan database user but not so orphan…

Beginning of this year, it is good to clean up orphan users in SQL Server databases. Even if this practice must be done regularly throughout the year of course. 😉 During my cleaning day, a new case appears that(…)