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.
In a project I have to move an Oracle 11.2.0.4-DB (around 7TB in size) from Sparc Solaris (called Source in the remainder of this Blog) to Linux x86-64 (called Target in the remainder of the Blog). I.e. a platform migration from Big Endian to Little Endian. A good method to do that is described in My Oracle Support Note 1389592.1:…
By Franck Pachot . Since 12cR2 is out, we give our 12c new feature workshop with hands-on exercises on 12.1 and 12.2 releases. When I gave it last month, I had a small problem when doing demos: sometimes the connections as sysdba failed with “ORA-01017: invalid username/password”. It was at random, about one every 5 login attempts and I was…
For the last conference day, after the Keynote about “JavaScript: The next Language YOU should learn” by Dan McGhan , I decided to attend presentations on following topics: – Upgrade your APEX app with zero downtime by using EBR – Understand and make use of CSS(3) – Best Practices for APEX Administrators – APEX Version Control and Team Working –…
After the Keynote about “Oracle Application Express – Ahead of it’s time. Leading the way forward” by Joel Kallmann (Director of Software Development for APEX) and some overall presentation about Development with APEX 5.1, I decided to attend presentations on following topics oriented towards tools to make developer’s life easier: – APEX OOS Tools and helper – Useful APEX plugins…
This year again the APEX connect conference spans over three days with mixed topics around APEX, like JavaScript, CSS, SQL and much more. After the welcome speech and the Keynote about “Reconciling APEX and the Thick Database Paradigm” by Bryn Llewellyn I decided to attend presentations on following topics: – Temporal Validity and Flashback Data Archive – Universal Theme and…
Today I visited a customer, who deleted a Data Guard configuration (i.e. a temporary Data Guard setup through the broker was deleted). The LOG_ARCHIVE_DEST_STATE_2 on the primary database was set to DEFER temporarily. That resulted in trace-files with name *tt*.trc to become huge (GBytes after a couple of days). Analysis showed that this was caused by bug 23300142 in 12.1.0.2.…
By Franck Pachot . I see lot of databases with two members for redo logs and also two members for standby redo logs. Why not, but when asking I realized that there are some mis-comprehension about it. And what was recommended 10 years ago may be different today. Online and Stanbdy redo logs Your transactions happen on the primary database…
By Franck Pachot . If you use a login.sql script to set the SQL*Plus environment from your current working directory, you will see that it will not run anymore in 12.2. This is a security feature, and a good occasion to explain how sqlplus finds the scripts to run, on Linux. For my test, I have login.sql, LOGIN.SQL, and script.sql…
By William Sescu There are some articles floating around how to prevent a license violation with Active Data Guard. Some of them related to an underscore parameter “_query_on_physical” and some of them related to a startup trigger. Both of them have advantages and disadvantages. E.g. regarding the “_query_on_physical” I can’t find any MOS Note about it, and I don’t know…
During the Frankfurter IT Tage I provided a presentation about SQL Plan Directives and how to reproduce a testcase in a test environment for a plan with used SQL Plan Directives (SPD). In that context I did a couple of tests with 12cR2 (12.2.0.1) and wanted to blog about the change in behavior in that release. Here is my testcase…
As part of the OTN Appreciation Day (see https://oracle-base.com/blog/2016/09/28/otn-appreciation-day/) I’m writing about one of my favorite Oracle features: External tables. Traditionally people loaded data in an Oracle database using SQL*Loader. With the introduction of external tables, SQL*Loader became obsolete (in my view ;-)), because external tables provide the same loading capabilities and so much more than SQL*loader. Why? Because external…
After the great Keynote about “APEX Vision, Past, Present, Future” by Mike Hichwa, the father of APEX, I decided to attend presentations on following topics: – Dynamic Actions 5.1 – APEX and Oracle JET – Enterprise UX patterns – APEX Scripting – Automation on APEX instance APEX Vision, Past, Present, Future: Mike Hichwa provided a very interesting overview of how…
