Martin's Blog

Latest — 31 Mar 2025

Oracle: Create or drop database link for/from different schema

You can't create a database link for another user than the one you logged in. Neither you can drop it. Here's a workaround...

More issues

Oracle: Time bombs

This post shows some time bombs in Oracle environments

LVM: Couldn't create temporary archive name

Resize an LVM volume when space is exhausted

Redis: Use Docker Compose for Redis

This is how to create a Redis single node or a Redis cluster using Docker Compose

Oracle: Use Docker Compose for Oracle Weblogic Server

Oracle WebLogic Server (WLS) is the application server made by Oracle. As I'm a DBA and not an application admin, I try to keep away from it, but sometimes, i. e. when using Cloud Control, I come into contact with it. The installation of WebLogic Server is no

GraphDB: Use Docker Compose for GraphDB

What is GraphDB? "Ontotext GraphDB is a highly efficient, scalable and robust graph database with RDF and SPARQL support. With excellent enterprise features, integration with external search applications, compatibility with industry standards, and both community and commercial support, GraphDB is the preferred database choice of both small independent developers

PostgreSQL: Use Docker Compose for PGadmin4

pgAdmin4 is a great tool to manage PostgreSQL databases. It can be installed locally; when you execute it, it starts a local webserver, and you can connect to it. But if there are more than one or two DBAs, it could be a benefit to install a central pgAdmin4. We&

Percona: Use Percona as an alternative for MySQL or MongoDB

Percona for MySQL Why Percona Percona for MySQL is a fork of MySQL. It aims to be a more stable alternative (as it fixes many bugs which still exist in MySQL), but it stays completely compatible with MySQL. No Innovation Release Percona for MySQL will not release innovation releases, because

CheckMk: Upgrade CheckMk using Docker Compose

This is about how to update or upgrade CheckMk inside a Docker container.