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Log Buffer #505: A Carnival of the Vanities for DBAs

This Log Buffer Edition searches through various blogs of Oracle, SQL Server and MySQL and picks a few contemporary ones.

Oracle:

Comma separated search and search with check-boxes in Oracle APEX

Once you have defined your users for your Express Cloud Service, all users with the role of Database Developer or higher can access the database Service Console.

Big Data Lite 4.7.0 is now available on OTN!

Install and configure Oracle HTTP Server Standalone

Can I …

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Donkey – system for MySQL automatic maintenance

We build this system based on Inception (Qunar)。

All of MySQL DDL/DML operations are based on Donkey system, with strict approval process to keep online system strong and available.

Open this file by Mockplus Donkey-system

MySQL Bug 72804 Workaround: “BINLOG statement can no longer be used to apply query events”

In this blog post, we’ll look at a workaround for MySQL bug 72804.

Recently I worked on a ticket where a customer performed a point-in-time recovery PITR using a large set of binary logs. Normally we handle this by applying the last backup, then re-applying all binary logs created since the last backup. In the middle of the procedure, their new server crashed. We identified the binary log position and tried to restart the PITR from there. However, using the option

--start-position

, the restore failed with the error “The BINLOG statement of type Table_map was not preceded by a format description BINLOG statement.” This is a known bug and is reported as MySQL …

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Percona Blog Poll Results: What Programming Languages Are You Using for Backend Development?

In this blog we’ll look at the results from Percona’s blog poll on what programming languages you’re using for backend development.

Late last year we started a poll on what backend programming languages are being used by the open source community. The three components of the backend – server, application, and database – are what makes a website or application work. Below are the results of Percona’s poll on backend programming languages in use by the community:

Note: There is a poll embedded within this post, please visit the site to participate in this post's poll.

One of the best-known and earliest web service stacks is the LAMP stack, which spelled out refers to Linux, Apache, MySQL and PHP/Perl/Python. We can see that this early model is still popular when it comes to the backend.

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Fun with Bugs #48 - Group Replication Bugs and Missing Features as of MySQL 5.7.17

It seems recent post on Group Replication by Vadim caused an interesting discussion on Facebook. I am NOT going to continue it here, but decided to present some facts, specifically, list of public bug reports and feature requests for Group Replication (mostly "Verified", that is, accepted by Oracle engineers as valid) as of MySQL 5.7.17 (where the feature is promoted as GA), with just few comments to some of the bugs.

The goal is to double check this post when next Oracle MySQL 5.7.x release appears, to find out how much Oracle carews to fix the problems already identified by MySQL Community.

So, here are the bugs and feature requests in …

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FOSDEM 2017 is over… this was again a great MySQL event !

FOSDEM 2017 is over, I brought back home the flu…. but hopefully not only !

Indeed this 2017 edition was very rewarding. We started our FOSDEM with a “fringe” : pre-FOSDEM MySQL Day where we highlighted MySQL 8.0 new features and hosted some talks from MySQL friends.

This first edition of the pre-FOSDEM MySQL Day was a great success. We had up to 70 attendees! I would like to thanks all the speakers: Morgan Tocker, Bernt Marius Johnsen, Øystein Grøvlen, Kenny Gryp, Jean-François Gagné, Dag H. Wanvik, …

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Group Replication: Shipped Too Early

This blog post is my overview of Group Replication technology.

With Oracle clearly entering the “open source high availability solutions” arena with the release of their brand new Group Replication solution, I believe it is time to review the quality of the first GA (production ready) release.

TL;DR: Having examined the technology, it is my conclusion that Oracle seems to have released the GA version of Group Replication too early. While the product is definitely “working prototype” quality, the release seems rushed and unfinished. I found a significant number of issues, and I would personally not recommend it for production use.

It is obvious that Oracle is trying hard to ship technology to compete with …

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Docker Images for Percona Server for MySQL Group Replication

In this blog post, we’ll point to a new Docker image for Percona Server for MySQL Group Replication.

Our most recent release of Percona Server for MySQL (Percona Server for MySQL 5.7.17) comes with Group Replication plugins. Unfortunately, since this technology is very new, it requires some fairly complicated steps to setup and get running. To help with that process, I’ve prepare Docker images that simplify its setup procedures.

You can find the image here: https://hub.docker.com/r/perconalab/pgr-57/.

To start the first node (bootstrap the group):

docker run -d -p 3306 --net=clusternet -e …
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Log Buffer #504: A Carnival of the Vanities for DBAs

This edition of Log Buffer covers Oracle, Microsoft SQL Server, and MySQL.

Oracle:

Data Pump or Data Pain Part02 – tablespace/user

Monday Spotlight: It’s About Security – Oracle Exadata SL6

0001_specify_date_format_mask.md copy

OGG Custom Adapters: How to include a unique identifier for …

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How does a relational database work

Introduction While doing my High-Performance Java Persistence training, I came to realize that it’s worth explaining how a relational database works, as otherwise, it is very difficult to grasp many transaction-related concepts like atomicity, durability, and checkpoints. In this post, I’m going to give a high-level explanation of how a relational database works internally while … Continue reading How does a relational database work →

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