Blog | Pythian (29)

Oracle

Automating Oracle RMAN backup configuration on Linux with Ansible

Having valid backup of the databases is one of the most important tasks for every DBAs. Having proper RMAN backup ...

MySQL

Understanding MySQL isolation levels: repeatable-read

Isolation levels are a rare subject in MySQL literature. The documentation provides a terse description and focuses ...

MySQL

MySQL crashes on DDL statement: a lesson on purge threads

Restructuring your database environments can be a high-stakes operation. Recently, I’ve encountered several reports of ...

Oracle

Orphaned disks in OVM and what to do with them

Some time ago I was doing a maintenance on an OVM and noticed that it had significant number of disks without mapping ...

Oracle

Oracle GoldenGate microservices architecture - first try.

Three or four months ago Oracle released a new 12.3 version of the Oracle GoldenGate (OGG) software. The release did ...

Oracle

Sending email from Oracle with utl_smtp via Amazon Simple Email Service (SES)

Note: This article was updated following Symantec Trust issues earlier in 2018.

Oracle

How to move or clone a Microsoft Azure virtual machine?

Introduction Have you ever tried to change the definitions of your Microsoft Azure Virtual Machine? Tasks like changing ...

Oracle

Oracle database upgrade on RDS AWS and SPM baselines

Introduction A couple of days ago I saw a question posted online asking about how AWS upgrades an RDS Oracle database ...

Oracle

Oracle 12.2 ASM filter driver installation

Recently I needed to install Oracle 12.2 with the ASM Filter Driver for some research on an upcoming presentation. With ...

Database

Updating Elasticsearch indexes with Spark

With the extensive adoption of Elasticsearch as a search and analytics engine, more often we build data pipelines that ...

Microsoft SQL Server

Multi Tb migration using mydumper

In this post I will explain how to transfer a multi terabyte size database between two MySQL instances using mydumper, ...

Oracle

Oracle Scheduler fail to send email notifications

Introduction In this blog post I would like to share an interesting issue we encountered couple of months ago related ...

Oracle

Oracle service secrets: more performance with less load-balancing

A huge but often overlooked aspect of tuning cluster databases is workload management. That means controlling on which ...

Oracle

Upgrade existing TDE to use new unified key management in 12c Upgraded Database (non-cdb)

I'm really excited to be writing this post and I'm hoping it serves as helpful content. When reviewing the new ...

Oracle

Standardizing the Oracle GoldenGate Home Path (OGG_HOME)

Introduction I don't work with Oracle GoldenGate extensively but when I do I find it somewhat remarkable that there ...

Cloud

Ansible and AWS automation

Overview The goal was to create and manage a MySQL RDS instance and learn how to control AWS resources by using ...

MySQL

Change of database passwords through OEM

Changing passwords for system database accounts is a necessary but often tedious routine. However, with Oracle ...

Oracle

Automating password rotation for Oracle databases

Password rotation is not the most exciting task in the world, and that's exactly why it's a perfect candidate for ...

Oracle

Idempotent and Nullipotent in Cloud

It’s funny how the more things change in tech, the more we end up reaching for those dusty university textbooks. ...

Oracle

Locating most current record using ROW_NUMBER() vs. Index Full Scan (Min/Max)

Very often when reading data, we need to locate the most current record for a set of conditions. One typical example is ...

Google Cloud

The data platform in the age of serverless architecture

“The transformation of the superstructure, which takes place far more slowly than that of the substructure, has taken ...

Oracle

Automation, PowerShell and Word Templates - let the technician do tech

In my work as a Database Consultant, I enjoy technical challenges, but it's always a painful process when I need to ...

MySQL

Exporting custom metrics to influxdb

In the TICK stack (Telegraf, InfluxDB, Chronograf, Kapacitor) from InfluxData, Telegraf serves as the crucial "T"—the ...

Oracle

Log rotation for Oracle database

Most of you may already know how to configure the log rotation for your database alert log or the listener log etc,. As ...

Microsoft SQL Server

How to analyze SQL server stack dumps

Troubleshooting SQL server stack dumps: A practical guide As a SQL Server production DBA, at some point in time you ...

Oracle

What you should know about Docker Containers for Oracle Data Integrator

Not long ago, Oracle adopted the Docker engine as one of the accepted platforms for its products and published a set of ...

Microsoft SQL Server

Dbatools and a SQL Agent

The mission: Tell every DBA around the world about a secret formula that will give them powers. What power do you think ...

Data Migration

Database migration using Apache NiFi

Introduction Apache NiFi is a powerful tool for data migration. It provides an easy to use interface to connect to a ...

Oracle

How to fix an AWR Warehouse after credentials change

We had an AWR Warehouse (AWRW) installation (OEM 12.1.0.5 on Linux) collecting data from +50 databases for a few ...

Oracle

The importance of Oracle database related kernel parameters (aio-max-nr) (with bonus track)

We tend to configure a server following Oracle best practices for the kernel parameters, but what once was a server of ...

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Analytics

Using Multi-Agent Reasoning for NLP-to-SQL

As data-driven decision-making becomes essential, access to that data shouldn’t require deep technical ...

Analytics

Becky's BI Apps Corner: OBIA 11.1.1.10.2

Upgrade jitters? If you’re running older versions of OBIA, the new 11.1.1.10.2 release brings game-changing features like automatic error handling and ...

Analytics

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Automating Oracle RMAN backup configuration on Linux with Ansible

Understanding MySQL isolation levels: repeatable-read

MySQL crashes on DDL statement: a lesson on purge threads

Orphaned disks in OVM and what to do with them

Oracle GoldenGate microservices architecture - first try.

Sending email from Oracle with utl_smtp via Amazon Simple Email Service (SES)

How to move or clone a Microsoft Azure virtual machine?

Oracle database upgrade on RDS AWS and SPM baselines

Oracle 12.2 ASM filter driver installation

Updating Elasticsearch indexes with Spark

Multi Tb migration using mydumper

Oracle Scheduler fail to send email notifications

Oracle service secrets: more performance with less load-balancing

Upgrade existing TDE to use new unified key management in 12c Upgraded Database (non-cdb)

Standardizing the Oracle GoldenGate Home Path (OGG_HOME)

Ansible and AWS automation

Change of database passwords through OEM

Automating password rotation for Oracle databases

Idempotent and Nullipotent in Cloud

Locating most current record using ROW_NUMBER() vs. Index Full Scan (Min/Max)

The data platform in the age of serverless architecture

Automation, PowerShell and Word Templates - let the technician do tech

Exporting custom metrics to influxdb

Log rotation for Oracle database

How to analyze SQL server stack dumps

What you should know about Docker Containers for Oracle Data Integrator

Dbatools and a SQL Agent

Database migration using Apache NiFi

How to fix an AWR Warehouse after credentials change

The importance of Oracle database related kernel parameters (aio-max-nr) (with bonus track)

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