Hello everyone, Hope you’re doing good. Over the last weeks I published two blog posts regarding upgrade DB Server Operating System from RHEL 7 to RHEL 8. In my last post, I am describing how to fix a bug/issue that is related to ACFS/AFD kernel…
Hi everyone, Hope you’re doing good! In my last blog post I wrote about an issue with ACFS modules after upgrading OS to RHEL 8.8. Well, if you read my blog post, you know that if you are running up to 19.19, 19.18 or 19.17,…
Hi everyone, Hope you’re doing good! A client called me because they faced some issues while they’re upgrading the Operating System from RHEL 7.9 to RHEL 8.8. Note that RHEL means Red Hat Enterprise Linux. Their environment is composed for clusters running on 19c. They…
Hi everyone, hope you’re doing good. In my last post I explained some basic concepts about Multipath and the importance to use it. You can read more here: Device Mapper Multipath – How this works? Why as a DBA I should concern about it? On…
Hi everyone, hope you’re doing good. On this blog post, I’ll discuss about DM Multipath and why this is so important when we are talking about Databases. OK, let’s first understand about how the disks interacts with the databases and/or vice-versa. If we think about…
Hi everyone! Hope you are doing good! I got a call from a client during their DR test. We do know that usually DR test means when the entire workload is moved to DR site. Some clients never execute DR test. 🙂 For this specific…
Hi everyone, Hope you’re doing good. I was working with a client where they have their DR environment running with Active DataGuard, ie, a physical standby database opened in read only mode, meanwhile is applying the transactions which are transfered from Production to DR. Sometimes…
Hi everyone, Hope you’re doing good. Before we go to the subject of this blog post, let me explain why the post have the #JoelKallmanDay tag! Since 2016, Oracle Community have a day where we push out content on the same day and try to…
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