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

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

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 ...

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 ...

Microsoft SQL Server

SQL Server on Linux – Configuration (Ubuntu)

Following on from my previous post where we installed SQL Server with the default configuration this article goes into ...

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 ...

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 ...

Oracle

Improve Oracle performance with ASM filter driver

Context Sometimes the results found in performance testing can be a bit of a surprise. I have recently been preparing ...

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 ...

MySQL

Exporting custom metrics to influxdb

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

Oracle

Cleaning up PID files when Oracle GRID/RAC upgrades and patches fail

Introduction: Unfortunately is it not all that unusual for a patch or upgrade to Oracle Grid or RAC to fail, requiring ...

Cloud

CPU utilization is not a useful metric

Once upon a time CPU utilization was quite a useful metric. Following are the output of several tools that provide CPU ...

Microsoft SQL Server

How to display database statistics for all objects used in a SQL statement

When my current task is to optimize a particular SQL statement, I find it quite useful if I can determine if 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 ...

Oracle

How Linux Hugepages work to improve Oracle performance

This post is not intended to be an in-depth discussion of how Linux Hugepages work, but rather just a cursory ...

MySQL

Backup and data streaming with xbstream, tar, socat, and netcat

Comparing Xtrabackup Streaming Methods: XBSTREAM vs. TAR On April 4th 2012 Xtrabackup 2.0 was released in to GA by ...

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

A look at current "Infrastructure as Code" Trends

Unless you have been hiding under a rock, you have probably heard the term “Infrastructure as a Code” thrown around. ...

MySQL

How to immediately kill ALL processes for a Unix user

Context On occasion I have found it necessary to immediately kill all processes for a particular user on a Linux or ...

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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Automating Oracle RMAN backup configuration on Linux with Ansible

MySQL crashes on DDL statement: a lesson on purge threads

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

Oracle service secrets: more performance with less load-balancing

SQL Server on Linux – Configuration (Ubuntu)

Standardizing the Oracle GoldenGate Home Path (OGG_HOME)

Idempotent and Nullipotent in Cloud

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

Improve Oracle performance with ASM filter driver

The data platform in the age of serverless architecture

Exporting custom metrics to influxdb

Cleaning up PID files when Oracle GRID/RAC upgrades and patches fail

CPU utilization is not a useful metric

How to display database statistics for all objects used in a SQL statement

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

How Linux Hugepages work to improve Oracle performance

Backup and data streaming with xbstream, tar, socat, and netcat

Database migration using Apache NiFi

A look at current "Infrastructure as Code" Trends

How to immediately kill ALL processes for a Unix user

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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