Welcome to my site

My name is Stefan Oehrli. I’m a Swiss electrical engineer working since several years as an Oracle DBA and consultant. My main interests are backup & recovery, database internals, database security, infrastructure management and other stuff coming across my daily work as a DBA and Platform Architect at Trivadis. For a while now, Oracle Unified Directory has been one of them. On this website I share my experience and some of my thoughts in these areas with you. Among other things, you find my blog, a few scripts, links to some papers and presentations I have written or co-authored, list of public appearances as well links to other interesting web resources.


Recent Posts

A list of the 5 most recent posts. To see a full list go to the Blogs.

  • How to safely resize an LVM volume on Linux
    I have several Oracle Cloud Infrastructure (OCI) based Lab environments, which I build with Terraform and corresponding shell scripts. Unfortunately the labs are not one size fits all. Depending on what I’m testing, I have different requirements for the available filesystems. So every now and then I face the problem that I have to increase […]
  • Get Oracle Database 23c for free on your Mac M1
    Oracle Database 23c Free – Developer Release is all over since Oracle released it yesterday. See the Official Oracle pages Oracle Database Free or the blog post by Gerald Venzl Introducing Oracle Database 23c Free – Developer Release. Connor McDonald even got a special delivery from Oracle. A few important web pages related to Oracle […]
  • Great, I found my Audit Policies again
    A while ago I wrote a blog post about issues with some Oracle Unified Audit Policies see Help I lost my brand new Unified Audit Policy? In the meantime, the whole thing no longer looks so tragic. The problem is an official bug for which Oracle has already released a one-off patch. See Oracle Support […]
  • Help I lost my brand new Unified Audit Policy?
    Just realized that under some conditions audit policies are not shown in AUDIT_UNIFIED_POLICIES. This blog post does provide a few information and a test case.
  • Easily mitigate log4j vulnerability in Oracle Unified Directory
    In December 2021, the critical vulnerability in Apache Log4j (CVE-2021-44228) was disclosed. With a CVSS rating of 10 out of 10, this vulnerability was or is extremely critical. Especially since Log4j is used relatively widely. Despite a great effort, many applications could only be corrected with a delay. Thus, it is not surprising that this […]

Want to see more blog posts? Just go to blogs or browse the archives.