Oracle Security at Trivadis TechEvent Fall 2018
A few days ago the semi-annual Trivadis TechEvent took place. As always, it was a great IT event where Trivadis employees and customers had the opportunity to exchange and discuss a variety of topics. I had the pleasure to give one lecture about Oracle 18c…
Oracle Database Backup Service – Encrypt your 12.2 Database Backups to the Cloud
The Oracle RMAN backup encryption is necessary if you want to backup your database into the Oracle cloud. In Oracle 12c, you have three methods available to encrypt an Oracle RMAN backup: with a passphrase with a master encryption key hybrid with a passphrase and…
Oracle CPU / PSU Pre-Release Announcement July 2018
Today Oracle has published the Pre-Release Announcement for the July 2018 Critical Patch Update. It’s quite a heavy update with not less than 334 security vulnerability fixes across the Oracle products. The Oracle database is relatively prominently represented with 3 security vulnerabilities and a maximal…
Oracle CPU / PSU Pre-Release Announcement July 2018
Today Oracle has published the Pre-Release Announcement for the July 2018 Critical Patch Update. It’s quite a heavy update with not less than 334 security vulnerability fixes across the Oracle products. The Oracle database is relatively prominently represented with 3 security vulnerabilities and a maximal…
Partition-Wise Operations – New Features in 12c and 18c
Partition-wise operations are not something new. I do not remember when they were introduced, but at that time the release number was still a single digit. Anyway, the aim of this post is not to describe the basics, but only to describe what is new…
TKPROF’s Argument PDBTRACE
If you run TKPROF without arguments, you get a complete list of its arguments with a short description for each of them (here the output generated by version 18.1.0): $ tkprof Usage: tkprof tracefile outputfile [explain= ] [table= ] [print= ] [insert= ] [sys= ]…
CDB Views and Query Optimizer Cardinality Estimations
Today I faced a performance problem caused by a bad cardinality estimation involving a CDB view in a 12.1.0.2 multitenant environment. While solving the problem I did a number of observations that I try to summarize in this blog post. First of all, when checking…
How Well a Query Optimizer Handles Subqueries?
At the beginning of December, at the UKOUG Tech17 conference in Birmingham (GB), I presented a comparison of the query optimizers of MySQL 8.0.3 and PostgreSQL 10.1. One of the things I talked about is their ability to handle subqueries. I summarized my findings with…
Oracle Data Pump with the 12.2.0.1.0 Instant Client for Linux x86-64
From the Oracle Database 12c Release 2 (12.2) New Features Guide: Adding Oracle Data Pump and SQL*Loader Utilities to Instant Client This feature adds SQL*Loader, expdp, impdp, exp, and imp to the tools for instant client. Now you can run these utilities on machines that…
Oracle 12.2 – how to get access to Enterprise Manager 12c Database Express
Today I have built in my OL 7.3 VM two container databases to verify the new feature in the Enterprise Manager 12c Database Express login screen where I can go direct into a container. The benefit is that I don’t have to set a separate…