Blog | Pythian (34)

MySQL

Creating a test lab using VirtualBox / NAT networking

My job is almost completely reliant upon my ability to perform work in lab of virtual machines. Almost every action ...

Oracle

Tracking ASM Metrics

Collecting ASM IO Metrics If you are an Oracle DBA, then it is quite likely that Oracle ASM is used as the storage ...

Oracle

Part 1: Oracle cloud database backup service

Oracle Cloud Database Backup Service (ODBS) This is part 1 of 3 in a series on "Getting Started with Oracle Cloud ...

Oracle

Oracle EBS R12.2: Restarting online patching enablement patch

If you are in process of upgrading to Oracle E-Business Suite 12.2.4, you would have went though this critical phase in ...

Oracle E-Business Suite

Oracle E-Business Suite: Virtual host names

The ability to use virtual host names with Oracle E-Business Suite is one of the features that I have been waiting for ...

Oracle

Online resizing of ASM disks

The SAN administrator recently informed us that several disks were extended from 300GB to 600GB. These multipath disks ...

Oracle

Part 2: Oracle Cloud Backups to AWS S3

Getting Started with Oracle Cloud Backups - Amazon Web Services (AWS) This is part 2 of a 3 part series on "Getting ...

MySQL

Using Docker to visualize MySQL performance schema

Context Last week, I was pleased to present at Percona Live Amsterdam 2015 regarding the importance of Performance ...

Oracle

RMAN full backup vs. level 0 incremental

Full backup vs. level 0 incremental: a physical comparison Perhaps you've wondered about this. What is the difference ...

Microsoft Azure

Three hidden Azure SQL database gotchas

Context Azure SQL Database is Microsoft’s Database as a Service (DBaaS) platform offering. It allows end users to ...

Oracle

Oracle 12c - adaptive query optimization

Scenario: A user complains that a batch job that is critical for the month end business processing is taking more time ...

Oracle

Patching fun: GI and database patches

Intro So, it has been some time since I have patched a database. Patching seemed necessary in a 12c database used for ...

Microsoft SQL Server

Import/export multiple SSIS packages

While I was working on a migration project recently, I had the task of importing and then exporting multiple packages - ...

Oracle

Licensing Oracle in a public cloud: the CPU calculation impact

Introduction: The Virtual Core Discrepancy Update 2015-May-11: Jean-Michael dug up another Amazon Web Services document ...

Cassandra

RMAN 11g : How to restore / duplicate to a more recent patchset

In an Oracle DBA's life, you'll be regularly asked to work on applying a new patchset on a database and then you will ...

Oracle

Migration of Oracle Database to Amazon RDS using Golden Gate

Migrating Oracle to Amazon RDS with Minimal Downtime Amazon RDS is a web service used to manage databases, like Oracle, ...

Microsoft SQL Server

Issues with Plan Cache Reuse & Row Goal Optimization

I am presenting here on behalf of my colleague Fabiano Amorim (he is busy resolving other exciting performance ...

Oracle

Autoconfig in Oracle EBS R12.2

The evolution of autoconfig in oracle e-business suite All seasoned Oracle Apps DBAs know that Autoconfig is the master ...

Microsoft SQL Server

Windows containers: installing SQL server

This blog post is a quick introduction to Containers in the Windows world, and a walk-through on installing SQL Server ...

Oracle

Magic of "\d" in Vertica

A quick neat way to list down important and oft-needed information like names of databases, schemas, users, tables, ...

Cassandra

Cassandra 101 : Understanding what Cassandra Is

An Introduction to Apache Cassandra As some of you may know, in my current role at Pythian I am tackling OSDB, and ...

Microsoft SQL Server

Disable Lock Escalation in SQL Server

Introduction If a lot of rows or pages are locked, the SQL Server escalates to a table-level lock, to save resources. ...

MongoDB

Difference between Oracle's table and Mongo's collection

Roughly speaking, the notion of 'Tables' in Oracle is similar to MongoDB's 'Collections'. They are NOT identical ...

Oracle

asmcmd> a better "du"

I discovered ASM with a 10.1.0.3 RAC running on Linux Itanium and that was a big adventure. At this time there was no ...

Oracle

Making existing SQLPLUS Scripts 12c and Container DB (PDB) compatible

Oracle 12c introduces new catalog features including CDB_ dictionary views (which include a CON_ID column) superseding ...

Oracle

EM12c : Login to GUI with the correct password causes authentication failure

Troubleshooting an EM12c Login "Authentication Failed" Error So the other day I was trying to log in to my EM12c R4 ...

Oracle

Weblogic patch rollback issues in Oracle EBS R12.2

When you try to rollback a weblogic patch in Oracle EBS R12.2, you might run into issues similar to below:

Cloud

Permissions in Redshift administration

As with any database administration strategy, management of Redshift requires setting and revoking permissions. When ...

Cassandra

My thoughts on the resilience of Cassandra

The Resilience of Apache Cassandra: An Introduction This blog is a part 1 of a 2 in a series. This will be different ...

MySQL

fsfreeze in Linux

Suspending and Resuming Access A filesystem can be frozen using following command: # /sbin/fsfreeze -f /data Now if you ...

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Creating a test lab using VirtualBox / NAT networking

Tracking ASM Metrics

Part 1: Oracle cloud database backup service

Oracle EBS R12.2: Restarting online patching enablement patch

Oracle E-Business Suite: Virtual host names

Online resizing of ASM disks

Part 2: Oracle Cloud Backups to AWS S3

Using Docker to visualize MySQL performance schema

RMAN full backup vs. level 0 incremental

Three hidden Azure SQL database gotchas

Oracle 12c - adaptive query optimization

Patching fun: GI and database patches

Import/export multiple SSIS packages

Licensing Oracle in a public cloud: the CPU calculation impact

RMAN 11g : How to restore / duplicate to a more recent patchset

Migration of Oracle Database to Amazon RDS using Golden Gate

Issues with Plan Cache Reuse & Row Goal Optimization

Autoconfig in Oracle EBS R12.2

Windows containers: installing SQL server

Magic of "\d" in Vertica

Cassandra 101 : Understanding what Cassandra Is

Disable Lock Escalation in SQL Server

Difference between Oracle's table and Mongo's collection

asmcmd> a better "du"

Making existing SQLPLUS Scripts 12c and Container DB (PDB) compatible

EM12c : Login to GUI with the correct password causes authentication failure

Weblogic patch rollback issues in Oracle EBS R12.2

Permissions in Redshift administration

My thoughts on the resilience of Cassandra

fsfreeze in Linux

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