Blog | Pythian | Database (29)

Oracle E-Business Suite

EBS DBA: R12.1.2 Another Step for Automated Vanilla EBS Cloning

As many of you know a cloning is one of the most DBA time consuming operations. For the first few times an Apps DBA may ...

Oracle

What's in your Exadata Smart Flash Cache?

One of the exclusive Exadata features is the Smart Flash Cache ( Oracle White Paper PDF). On a full rack, there is 5 TB ...

Oracle

Updating ASMLIB Driver Using "update-driver"

It is a controversial question whether to use ASMLIB for managing disks for an ASM instance, but I don't want to start ...

Oracle

Oracle's OPT_ESTIMATE hint: Usage Guide

It's one of those hints that you've heard about many times, but all the information is scattered, and finding what you ...

MySQL

InnoDB error: Total number of locks exceeds the lock table size

Recently, one of our customers had a problem with one of their replication slaves where a sql statement gave an error ...

Microsoft SQL Server

Using UNPIVOT with CDC Functions to get Updated Columns List

Microsoft introduced Change Data Capture (CDC) technology in SQL Server 2008. This technology captures DML ...

MySQL

How and why tmp_table_size and max_heap_table_size are bounded.

Overview In some cases, MySQL creates internal temporary tables while processing queries. On the base of the dimensions ...

Oracle

Exadata's Best Kept Secret: Storage Indexes

While features like Smart Scan often steal the spotlight in Exadata discussions, Storage Indexes are a silent ...

Oracle E-Business Suite

EBS DBA: WF Mailer Override Address and Cloning: How to

I just recently faced an issue regarding how to automate the Workflow Mailer override address for development and ...

Oracle

Exadata TPC Benchmarks

Notice One of the questions in my webinar this week related to TPC benchmark results for Exadata. Kevin Closson blogged ...

Oracle

Physical Disk, Cell Disk, Grid Disk, and ASM Disk in Exadata

Exadata is the Ferrari of the technology world. It’s considered the technology for the select few, but everyone dreams ...

Oracle

Cloning Oracle Home from RAC to Stand-Alone

This should have been the easiest task on my todo list: Install Oracle 10.2.0.3 EE standalone on a new Linux RHEL 5 ...

Oracle

Emergency Recovery or RMAN DUPLICATE Rerun Just Works!

Working as a DBA often means facing high-pressure situations, especially during an on-call weekend. Recently, I was ...

Oracle

Data Pump Monitoring

During database maintenance, one of the most critical questions is: "When will it be finished?" Whether it is an ...

MySQL

How I Find MySQL Fragmentation

Background Sarah Novotny recently posted InnoDB Tablespace Fragmentation – Find it and Fix it, so I thought I would ...

Oracle

Chopt Utility

Introduction There is a new tool came with Oracle 11g Rel.2 that helps to modify options in installed oracle home ...

Oracle

CheckSystemSpace ignorance

Context Every installation is unique. It can be the same software and hardware but one installation will squease you ...

Oracle

AWR Extract and Load

Introduction In preparing my presentation for the Michigan Oak Table Symposium, I came across AWR extract and load. ...

Oracle

Swappiness

Swappiness, as the name suggests, affects the swapping in the Linux systems. Introduction Its kind of slider value. 0 ...

Oracle

Exadata smart scans and the flash cache

Context One of the key features of Exadata V2 is the flash cache. Although commonly thought of as an OLTP-specific ...

Oracle

RDBMS Online Patching

If you support Oracle RDBMS 11.2.0.2 and want to zero downtime applying patches to databases then it is time to have a ...

MySQL

Notes on Learning MySQL (as an Oracle DBA)

I spent some time last month getting up to speed on MySQL. One of the nice perks of working at Pythian is the ability ...

Oracle

Comparing Oracle Database Appliance and Exadata

Introduction Oracle Database Appliance (ODA) is in many ways similar to an Exadata quarter rack: they both use two ...

Oracle

Beware the /var/tmp/.oracle Hidden Directory!

Background A few months ago, we had a test instance complaining that it couldn’t write to ASM. This was an 11.1.0.7 ...

Oracle

Installing Oracle 11gR2 Enterprise Edition on Ubuntu 10.04 (Lucid Lynx)

I recently reformatted my laptop with the latest Ubuntu LTS release, 10.04, aka Lucid Lynx. Since I like to have a ...

Oracle

Viewing RMAN jobs status and output

Checking RMAN backup status via database views Yesterday I was discussing with a fellow DBA about ways to check the ...

Oracle

Designing for Exadata: Maximizing Storage Indexes Use

Oracle Exadata V2 is a very well balanced database machine combined with smart and innovative software. One of these ...

Oracle

Encryption RMAN Backup

There are 2 configurable items related with RMAN encryption backup : CONFIGURE ENCRYPTION FOR DATABASE OFF; # default ...

MySQL

How to Run a Streaming Backup with innobackupex

On many of our clients, we have a need to run XtraBackup as a regular OS user. Aside from running into the issue where ...

Oracle

A grand tour of Oracle Exadata, Part 2

After covering hardware components of Sun Oracle Database Machine in part 1, our grand tour continues with a look at ...

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EBS DBA: R12.1.2 Another Step for Automated Vanilla EBS Cloning

What's in your Exadata Smart Flash Cache?

Updating ASMLIB Driver Using "update-driver"

Oracle's OPT_ESTIMATE hint: Usage Guide

InnoDB error: Total number of locks exceeds the lock table size

Using UNPIVOT with CDC Functions to get Updated Columns List

How and why tmp_table_size and max_heap_table_size are bounded.

Exadata's Best Kept Secret: Storage Indexes

EBS DBA: WF Mailer Override Address and Cloning: How to

Exadata TPC Benchmarks

Physical Disk, Cell Disk, Grid Disk, and ASM Disk in Exadata

Cloning Oracle Home from RAC to Stand-Alone

Emergency Recovery or RMAN DUPLICATE Rerun Just Works!

Data Pump Monitoring

How I Find MySQL Fragmentation

Chopt Utility

CheckSystemSpace ignorance

AWR Extract and Load

Swappiness

Exadata smart scans and the flash cache

RDBMS Online Patching

Notes on Learning MySQL (as an Oracle DBA)

Comparing Oracle Database Appliance and Exadata

Beware the /var/tmp/.oracle Hidden Directory!

Installing Oracle 11gR2 Enterprise Edition on Ubuntu 10.04 (Lucid Lynx)

Viewing RMAN jobs status and output

Designing for Exadata: Maximizing Storage Indexes Use

Encryption RMAN Backup

How to Run a Streaming Backup with innobackupex

A grand tour of Oracle Exadata, Part 2

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