Oracle Database as our consultants live it every day: installation and patching, upgrades, RMAN backup and recovery, Data Guard, RAC, performance tuning, multitenant, licensing, and engineered systems such as ODA and Exadata.
Last week I visited the Oracle University Event “Expert Summit 2016” in Berlin, Germany. Besides the nice location in the Adlon Kempinski hotel, close to the Brandenburger Tor, I saw very interesting presentations from Jonathan Lewis (Database Troubleshooting and Tuning) and Pete Finnigan (Oracle Database Security Audit Training). The training from Pete was about how to do a database security…
I recently visited an Oracle presentation about the Oracle-kernel built-in directNFS (dNFS) driver. To use dNFS in the database you have to enable it: cd $ORACLE_HOME/rdbms/lib make -f ins_rdbms.mk dnfs_on REMARK: In versions before 11gR2/12c the following manual steps were necessary: cd $ORACLE_HOME/lib mv libodm11.so libodm11.so_stub ln –s libnfsodm11.so libodm11.so In the context of make-commands, somebody in the audience asked…
Available methods to enable 10046 trace are described in My Oracle Support Note 376442.1. You can enable 10046-tracing – on session level (alter session) – for other sessions (e.g. with oradebug, the package DBMS_MONITOR or DBMS_SYSTEM) What is not covered with the methods above is the possibility to trace a specific SQL-statement, which runs “somewhen” in the future on the…
By Franck Pachot . I use transportable tablespaces a lot since 8i, here are just a few examples. Same disclaimer here as in the first post of the series: don’t expect to get those posts close to what you will have at the exam, but they cover important points that matches the exam topics. Documentation Information about the exam says:…
By Franck Pachot . Yesterday I came upon a comment on oracle-l while I was reading my slides for the UKOUG TECH15 SuperSunday. I’ve one slide and one demo about disabling SPD usage but that’s not enough to explain all variations of what ‘usage’ means here. The comment on Oracle-L was: Seems like even after disabling sql plan directives they…
By Franck Pachot . Let’s see the different ways to create a PDB, with different tools. Same disclaimer here as in the first post of the series: don’t expect to get those posts close to what you will have at the exam, but they cover important points that matches the exam topics. Documentation Information about the exam says: Be prepared…
By Franck Pachot . This post starts a series about things I wrote while preparing the OCM 12c upgrade exam. Everything in those posts are written before taking the exam – so don’t expect any clue about the exam here. It’s based only on the exam topics, and only those points I wanted to brush up, so don’t expect it…
By Franck Pachot . I like to come upon new monitoring software that help to go quickly from user response time to root cause. And I love applications that can be installed easily and at which I can give a try without reading pages of manual. At DOAG 3rd floor I’ve visited the AppDynamics booth and immediately wanted to install…
By Franck Pachot . I was looking at twitter analytics showing my top tweets in November and that puzzled me because tweets with the most ‘impressions’ and ‘engagement’ are related to events that had low audience in real. Any comment is welcome as it can help to understand why some events have low audience. Here it is. I’ve put my…
By Franck Pachot . By default, In-Memory Column Store population is done in background, asynchronously. There are two hidden parameters that can change this behavior, let’s see how it works. Note that this is only good for research, those parameters are undocumented which means that they may not behave as you think they would. In a demo about in-Memory (slides,video)…
By Franck Pachot . Today every DBA should have a lab on his laptop. This is where I reproduce most of cases before opening a SR, or to investigate something, to demo, to learn new features, or to prepare an OCM exam. I’ve a few basic VirtualBox VM with single instance databases (11g and 12c, SE and EE, CDB and…
By Franck Pachot . It’s next week at #DOAG2015 Interested in a deep dive of logical replication? Let’s try it. The best way to learn is to try it and this is the idea of #RepAttack where you can quickly install a replication configuration on your laptop, using VirtualBox, Oracle XE, and Dbvisit replicate trial version. Last year Jan Karremans…
