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AUDIT_SYS_OPERATIONS and top-level operation
SYSDBA is powerful. You should use it only when you need to. And you should audit what is done when connected SYSDBA. This is achieved by AUDIT_SYS_OPERATION. But do you have an idea how much audit log...
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ODA X6 command line and Web Console
The ODA X6 comes with a new command line (odacli) which replaces oakcli, and with a small web console which can display information about the appliance, the databases and the provisioning jobs. It also...
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ODA X6 database classes and shapes
On the Oracle Database Appliance, like on the Oracle public Cloud, you define the CPU capacity with ‘shapes’. On the latest ODA, the X6, we have a new interface to provision a database. Let’s look at...
View ArticleLetting GoldenGate automatically maintain the insert and update timestamps on...
Today at one of our GoldenGate customers we were faced with the following requirement: For one of the tables on the target we needed two additional columns which shall hold the insert and update...
View ArticleFilenames in AWR reports
If you have read my latest blog posts, you know I’ve measured IOPS with SLOB to estimate ACFS overhead on a fast storage. This blog is about something I learned after wasting one hour on the result....
View ArticleThe fastest way to get the Oracle sample schemas
Do you need the Oracle sample schemas to do a quick test or demonstration? And, as always, you did not install the sample schemas when you did the setup of your environment? The probably fastest way to...
View ArticleRolling Invalidate Window Exceeded
Today I was doing a hard parse storm post-mortem analysis. One hypothesis was rolling invalidation causing invalidation, but figures didn’t match. I often reproduce the hypothesis to check the numbers...
View ArticleUnderstanding Row Level Security on PostgreSQL
In this article we will talk about a nice feature Row Level Security on PostgreSQL. We are using EDB Postgres Advanced Server 9.5. Suppose that I am a team manager and that employee bonus are stored in...
View ArticleAuditing in PostgreSQL
Today, especially in the Pharma and Banking sectors, sooner or later you will be faced with the requirement of auditing. Detailed requirements will vary but usually at least tracking logons to the...
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Initiate a local GIT repository in command line
Objective of the document is to describe how to start manually with command lines a development project, from an existing GIT repository. Usage of GIT protocol for software development empowers...
View ArticleAdaptive Plans and cost of inactive branches
Here are the details about an execution plan screenshot I’ve tweeted recently because the numbers looked odd. It’s not a big problem, or maybe not a problem at all. Just something surprising. I don’t...
View ArticleDisable Red Hat 7 Transparent Hugepages
Ausgangslage Ein Kunde hat mich kürzlich angefragt, wie am effizientesten alle Kernel Tuning Parameter für Oracle bei Red Hat 7 konfiguriert werden können. Daraus habe ich untersucht welche...
View ArticleMultitenant thin provisioning: PDB snapshots on ACFS
Database on ACFS is a long story. At first, the main reason for ASM was to bypass a filesystem layer that is not required by the database. ACFS was for the non-database files that had to be accessed by...
View ArticleEDB Failover Manager 2.1, upgrading
Some days ago EnterpriseDB released a new version of its EDB Failover Manager which brings one feature that really sounds great: “Controlled switchover and switchback for easier maintenance and...
View ArticleEDB Failover Manager 2.1, (two) new features
In the last post we upgraded EDB EFM from version 2.0 to 2.1. In this post we’ll look at the new features. Actually we’ll look only at two of the new features in this post: Failover Manager now...
View ArticleSecuring your connections to PostgreSQL by using SSL
Security is a big topic today and in the news almost every day. As the database usually holds sensitive data this data must be well protected. In most cases this is done by encrypting critical data...
View ArticleWhat the hell are these template0 and template1 databases in PostgreSQL?
When people start to work with PostgreSQL, especially when they are used to Oracle, some things might be very confusing. A few of the questions we usually get asked are: Where is the listener and how...
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Sharding with PostgreSQL
In this article we are going to talk about sharding in PostgreSQL. What is sharding, Sharding is like partitioning. The difference is that with traditional partioning, partitions are stored in the same...
View ArticleResult cache side effects on number of calls
During the execution of a SQL statement, you cannot guess how many times an operation, a predicate, or a function will be executed. This depends on the execution plan, on some caching at execution, and...
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The dbi Open Infrastructure Technology Division
As you already might know dbi (on a technical level) is organized into several technology divisions. Traditionally there is one for Oracle, one for Microsoft and one for Middleware products. Almost a...
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