Everything our consultants learn while running databases for customers: Oracle, PostgreSQL, SQL Server, MySQL, MariaDB, MongoDB and Delphix. Expect hands-on posts about installation, day-to-day administration, backup and recovery, performance tuning, replication and upgrades.
By Mouhamadou Diaw When deploying new Oracle Home on the same server or on a new server, you may use the downloaded Oracle binaries and do an install from scratch as usual. You may then apply any patch you have on your actually Oracle Homes. This may take time. Oracle provides tools to clone an existing Oracle Home with all…
By Clemens Bleile From Oracle Database Appliance (ODA) version 19.11. onwards the ORACLE_HOMEs and ORACLE_BASE will be created on ACFS, i.e. take space from an ASM-diskgroup instead of taking filesystem space from /u01. See this blog concerning details. If the ODA has been upgraded from a release < 19.11. to 19.11. or newer, then you usually have diag- and admin-data…
The next task in my journey with DB2 is to apply a patch. In the world of DB2 there are Modification Packs and Fix packs. As far as I understand it, Modifications Packs come with new features, while Fix Packs come with bug fixes only. Keeping your database installations up to date is important, that applies to all products. As…
Hi Team, Sometimes I was struggling with my VM to install and test my favorite software. Many problem can occur, VM can crash , need to install again, select the correct image computer , manage resources allocation and consumption can be sometime a nightmare. But as I am lucky, one of my dbi colleague advised me to use public cloud,so…
If, and you should, are doing base backups of your PostgreSQL instances you’ve probably used pg_basebackup. Another use case for pg_basebackup is to create a starting point for replicas when you are setting up streaming replication. Up to now, pg_basebackup will send the result always to the node/machine where you started it. That means: If you started pg_basebackup on your…
In the first post about Db2 I went for the non-root installation method. While this is great if you want to get started fast and to do some tests this also comes with limitations. Most installations, I guess, are root installations, especially if you want to run more than one instance on a host, and you want to have them…
By Mouhamadou Diaw In a previous blog , I was talking about virtual machines on ODA servers. Sometimes it comes that we want to add another network interface for other purpose. In this blog I am describing the main tasks to add a second network interface card on KVM virtual machine. Let’s describe the context I have an ODA X8-2M…
The last post about Db2 was about getting it up and running. As the issue we had to solve was about performance, getting an explain plan for the problematic statement(s) was the obvious step to do. In PostgreSQL you can just use EXPLAIN for that, and you’re done. In Db2 the procedure is a bit different, but once you know…
Some time ago I’ve written about migrating a CentOS 8 machine to Red Hat 8, because CentOS 8 reached end of life last December. We did that for all CentOS 8 installations at that customer and all are running as virtual machines. The very same customer has many EC2 instances running on CentOS 7. Migrating away from CentOS 7 is…
Introduction When it comes to performance analysis on Oracle databases, everybody think about Diagnostic Pack. This is a very complete tool and it brings much more metrics than a DBA can analyze. But there is a big drawback with this tool: it’s not included in Standard Edition and it’s an option with Enterprise Edition. If you don’t have this tool,…
For this installation i’m using a Hardkernel Odroid N2/N2+ which are ARM S922X, means ARM Big Little Architecture with Quad-Core-ARM-Cortex-A73-CPU-Cluster and a Dual-Core-Cortex-A53-Cluster and a Mali-G52-GPU. These device is normaly a good device as Mediaplayer using Coreelec based on Kodi, it has everything needed for including IR receiver for IR remote device. The installation of ARMBIAN is a easy step,…
My last contact with IBM Db2 was more than 10 years ago, and that only on the SQL/application level. I’ve never done an installation of Db2 as most of our customers either don’t use it, or we don’t know about it, or these databases are managed by other teams than those we work with. And now we have a request…
