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June 2020

Oracle Autonomous Linux: cron’d ksplice and yum updates

By Franck Pachot

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Oracle Enterprise Linux (OEL) is a Linux distribution which is binary compatible with Red Hat Enterprise Linux (RHEL). However, unlike RHEL, OEL is open source, free to download, free to use, free to distribute, free to update and gets free bug fixes. And there are more frequent updates in OEL than in CentOS, the free base of RHEL. You can pay a subscription for additional support and features (like Ksplice or Dtrace) in OEL. It can run the same kernel as RHEL but also provides, still for free, the ‘unbreakable kernel’ (UEK) which is still compatible with RHEL but enhanced with optimizations, recommended especially when running Oracle products.

Celebrating Pride Month: Perspectives on Identity, Diversity, Communication, and Change

Throughout June, we’ve published a series of Q&As at WordPress Discover featuring members of the Automattic team. These conversations explore personal journeys; reflections on identity; and diversity and inclusion in tech, design, and the workplace. Here are highlights from these interviews.

Oracle 19c Automatic Indexing: Common Index Creation Trap (Rat Trap)

When I go to a customer site to resolve performance issues, one of the most common issues I encounter is in relation to inefficient SQL. And one of the most common causes for inefficient SQL I encounter is because of deficiencies the default manner by which the index Clustering Factor is calculated. When it comes […]

Editing and Enhancing Images in the WordPress Apps

The WordPress app on your Android or iOS device is your companion wherever you go. Manage your site, write and publish, and even add images to your posts — from anywhere you are. Oftentimes, the most engaging posts include visuals, like the photos you take on the go: pictures from last week’s walk, snapshots of your afternoon picnic, or portraits of the family with your puppy.

Have you ever needed to edit your images on your phone? Maybe the lighting wasn’t quite right, or the framing and composition were off. You can now make small retouches right in the WordPress app, like cropping, rotating, and even adding a filter to change the mood of your photos.

Most Recent – 2

A question arrived in my email a few days ago with the following observations on a statement that was supposed to query the data dictionary for some information about a specified composite partitioned table. The query was wrapped in a little PL/SQL, similar to the following:

Video : Hybrid Partitioned Tables in Oracle Database 19c

In today’s video we’ll give a quick demonstration of Hybrid Partitioned Tables, introduced in Oracle Database 19c.

The video is based on this 19c article.

The video only has a single example using external partitions pointing to CSV data. The article also includes and example using a Data Pump file.

MAX_STRING_SIZE – stretching the dictionary

This post cycles back too some other historical posts of mine related to max_string_size and the fact that the data dictionary uses LONG data type columns because of historical reasons related to backward compatibility. Most of us probably have existing databases that have gone through the standard upgrade through various versions of the Oracle Database, and as such, all of our existing database have a max_string_size of STANDARD. Thus to convert to the larger string size, we start by setting max_string_size to EXTENDED, run the appropriate scripts after shutting out database down and re-opening it in upgrade mode, setting the appropriate initialization parameters for the instance in our SPFILE. But what if you are creating a new database?

The Oracle ACE program ♠ what it is not ♠

By Franck Pachot

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I had a few questions about the Oracle ACE program recently and I thought about putting some answers there. Of course, that’s only my point of view, there’s an official web page: https://www.oracle.com/technetwork/community/oracle-ace/index.html

The program is flexible and open, with a large diversity of people, technologies, contributions, levels,… Then rather than explaining what it is, which would be limiting, I’ll rather tell you… what it is not.

Some myths about PostgreSQL vs. Oracle

By Franck Pachot

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I originally wrote this as a comment on the following post that you may find on internet:
https://www.2ndquadrant.com/en/blog/oracle-to-postgresql-reasons-to-migrate/
but my comment was not published (many links in it… I suppose it has been flagged as spam?) so I put it there.

You should never take any decision on what you read on the internet without verifying. It is totally valid to consider a move to Open Source databases, but doing it without good understanding is a risk for your migration project success.

DataPump migration to SECUREFILE

These tweets somewhat befuddle me.

image

Because to be honest, if I no matter if I say “Yes” or “No” , and then for someone to take that response at face value…well…whilst I’m flattered in the level of trust, I’m also a little saddened because I think our community is best served by everyone always insisting on evidence for claims.