How to troubleshoot an ORA-28030 error

ORA-28030: Server encountered problems accessing LDAP directory service. Cause: Unable to access LDAP directory ...

PRKO-2002 : small things, large shadows

This short blog post is a reminder to remember the syntax. I was just trying to bring down local listeners at half rack ...

Step-by-step guide to January 2016 PSU patch apply on 12c drid and RDBMS homes in Linux

ASM nternals: tracking down failed ASM reads

How to build a multi-domain cluster with AlwaysOn availability groups - SQL Server 2016

SQL Server 2016 is making lots of news, and promises to be a revolutionary SQL Server version. In talking about ...

Recursion in Hive - part 1

I am going to start this new series of blog posts talking about code migration use cases. We will talk about migration ...

An UNDO in a PDB in Oracle 12c?

SQL Injection with MySQL SLEEP()

Recently we've received an alert from one of our clients that running threads are high on one of their servers. Once we ...

Network multicast support on Azure

Configure high availability - load balancing for Hiveserver2

We are noticing a steady adoption of Hive adoption among our customers. Due to the increased workload we want to make ...

Oracle RAC on Azure

Microsoft Azure provides an acceptable and affordable platform for a training environment. I am an Oracle DBA, and use ...

Issues with Oracle secure external password stores

Background In the previous article, I covered the basics of how to remove database passwords (credentials) from Oracle ...

Oracle E-business suite: Virtual host names solution

This blog post is a continuation to an earlier post about my musings on Oracle EBS support for virtual host names. ...

Securing Oracle monitoring and backup scripts

Background Almost every DBA writes and uses various custom scripts to monitor and backup their Oracle databases. ...

How to run OpenTSDB with Google Bigtable

In a previous post ( OpenTSDB and Google Cloud Bigtable) we discussed OpenTSDB, an open source distributed database ...

Oracle's CREATE INDEX command can take a hint

While experimenting with Auto DOP (parallel_degree_policy) in Oracle 12c, I stumbled upon a highly effective (and ...

How to decipher oracle Internal datatype storage

What started out as an investigation into how the optimizer deals with predicates that are outside the known range of ...

Locks, blocks and deadlocks - what's the difference?

Explanation We are often being paged by development teams talking about locks, blocks or deadlocks and some people make ...

GoldenGate 12.2 big data adapters: part 1 - HDFS

December 2015 brought us a new version of GoldenGate, and a new version for Big Data adapters for the GoldenGate. Let's ...

Benchmarking Google Cloud SQL instances

Google Cloud SQL is a fully managed database service that makes it easy to set-up, maintain, manage, and administer ...

Data encryption at rest

This blog post was co-authored by Peter Sylvester and Valerie Parham-Thompson Introduced in version 10.1.3 (and with ...

SQL server 2016 - AlwaysOn basic availability group

Recently I was playing with the SQL Server 2016 CTP 2 and noticed that there was a new feature introduced - Basic ...

Why locking Oracle accounts is a bad idea

Time and time again I run into database accounts which are marked "LOCKED" or "EXPIRED & LOCKED". The main problem ...

Google Cloud Dataproc in ETL pipeline - part 1 (logging)

Google Cloud Dataproc, now generally available, provides access to fully managed Hadoop and Apache Spark clusters, and ...

Changes to DBCA patch application behaviour causes PDB cloning to fail

Background A test upgrade from 11g to 12c and conversion to a container and pluggable database recently pointed out ...

GoldenGate 12.2 big data adapters: part 2 - FLUME

In this blog post, we continue our review of the new Oracle GoldenGate Big Data adapters. In the first part of the ...

Connection timeout parameters in MySQL

Introduction wait_timeout interactive_timeout net_read_timeout net_write_timeout What do these timeouts do in MySQL? If ...

Centralized authentication with Red Hat directory server for Linux systems

User management on Linux systems can be tedious, and when you add in more than 10 systems the chances are it is going ...