News about the Blog!

If you used to follow MatheusDBA blog, you may have noticed that the URL, name and categories changed this week. The reason is that the blog is passing to a new moment. But don’t worry, it’s just to become better than already is.

A few friends and I decided to join our blogs in one, and centralize the posts. As result, you can expect more frequently posts, different styles of posting and other subjects like GoldenGate, Fusion Middleware and Exadata covered more deeply.


Please, take a look on “About” section to more information about the change.
Also look at “Members” to know the new authors.

I’m going to continue blogging here, at
The URL is now beeing used as my personal website.

I Hope you like it!
Cheers to new phase!

Best wishes,
Matheus. at GUOB 2015!

Hi all!
It was a great pleasure to me beeing with the starts in GUOB Tech Day 2015 – LA OTN Tour, event organized by GUOB (Grupo de Usuários Oracle – Brasil). This year we had the opportunity to get in touch with Kerry Osborne, Tim Hall, Alex Gorbachev, Mike Dietrich, Francisco Alvarez and others well known in Oracle world. We had also a speech by Alex Zaballa, our fresh and first Brazilian Oracle ACE Director.

One of the bests speeches, by Kerry Osborne, is also available on his site, here. Take a look!

I know, we are a little bit ugly, but is valid for the moment:

guob3(Rafael Nolio – GrepOra, William Fagundes, Rodrigo Jorge and Matheus Boesing – GrepOra)

Recently, GUOB organization team released some videos from the best presentations. Below:

Kerry Osborne
Tim Hall
Mike Dietrich

So, this is it!
See you on GUOB Tech Day 2016!

Whats is the main characteristics/skills of a DBA? [part 2]

This is a second round about this post.

In the first part, I listed the top 8 “Personal Characteristics” of a DBA, to me and 7 other authors. Now, let’s do the same about the “Technical Characteristics”, or just “Skills”…


As I said in the first part of, it’s not an usual subject, so, identify and select these skills was not an easy task. Also as in the first part, I made my own list before the search. And I believe in something like that…

# Top 8 DBA Skills:
(By Matheus)

1) Database Architecture

Components, pools, events, basic flow and structure, reports, logs, traces, views, SQL concepts… In a nutshell, how to use a Database. 

2) Logic and some Programming Skills

Basic programming skills/logic is needed. Programming best practices, techniques and logics base in, at least, 2 different paradigms.

3) Infrastructure Knowledge

Components that surround or are basic services to DB : Networks, Computer Architecture / processors , Storage , Application Server operation , etc.

4) Data Structs and Database Design/Modeling

After all, it’s what database means: understand about structure of objects, partitioning, indexes, statistics, transactions, data modeling, manipulation tools and data migration.

5) Solid SQL and PL/SQL

As a base of data, you must know where data is, how to get it, how to manipulate it efficiently and aligned with good development practices. Isn’t it?

6) Database and SQL Performance Tuning

Wide and the hardest to archive in my opinion. For archive excellence on it, you’ll need all items above. Database operating knowledge, their pools, optimizers, available resources, development/programming and SQL to find gaps in the code, and infrastructure knowledge to understand possible external interference in the functioning of the DB.

7) Security and Oracle Support Interacting

Knowing good patching management practices, how to apply them, techniques and strategies for patch, upgrade and migration, openness and interaction on SRs, navigation Metalink, seraching and understanding of bugs, backup/recovery (DRs) management, access and possible security gaps in infrastructure, systems, or credentials.

8) Knows the Environment / Applications

To know the main applications of the company where you are, it implementation language, some business rules, the environmental behavior, most normal events, peak hours, the operation of legacy applications, people, company practices and their major gaps is essential.

What do you think about my list?
Here is the lists of 5 important references I found, just to have in mind:

# Burleson
– System analisys and design skills
– Database design skills
– Physical disk storage skills
– Databa Secutiry Skills
– Backup and Recovery Skills
– Change Control Management Skills

# Craig Mullins
– Data modeling and database design
– Metadata managements and respository usage
– Database schema creationg and management
– Backup and recovery
– Ensuring data integrity
– Performance management and tunning
– Ensuring availability
– SQL code reviews and walk-thru
– Procedural skills
– Data security
– Capacity planning
– General database management
– General system managements and networking skills
– ERP and business knowledge
– Extensible datatype administration
– Web-specific technology expertise
– Storage management technics

# Mark Spenik and Orryn Sledge
– Knowledge of Structured Query Language (SQL)
– Sound database design
– General understanding of network architectures (for example, Client/Server, Internet/Intranet, Enterprise)
– Knowledge about the database itself

# Oracle
– Installing and upgrading the Oracle server and application tools
– Allocating system storage and planning future storage requirements for the database system
– Creating primary database storage structures (tablespaces) after application developers have designed an application
– Creating primary objects (tables, views, indexes) once application developers have designed an application
– Modifying the database structure, as necessary, from information given by application developers
– Enrolling users and maintaining system security
– Ensuring compliance with your Oracle license agreement
– Controlling and monitoring user access to the database
– Monitoring and optimizing the performance of the database
– Planning for backup and recovery of database information
– Maintaining archived data on tape
– Backing up and restoring the database
– Contacting Oracle Corporation for technical support

# Wikipedia
– Communication
– Database theory
– Database design
– Technology knowledgements
– Computing architectures
– Operating Systems

What do YOU think about it?

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Leave a comment and feel free to share it!

Whats is the main characteristics/skills of a DBA? [part 1]

More than a half decade acting as DBA, I still frequently asking myself about what means being a DBA? What is needed for? Or, more precisely: How to achieve the excellence in my job?

Well, I spent the last nights thinking and searching for this subject in the web. You might suppose I found a few answers, right? Yes, of course I found. So, let’s understand and analyze it.

In the first place, let me share with you some pre-steps/conditions: Looking for don’t be 100% reactive and use, at least a little bit of, my gray matter, I decided the structure my own “list” before the search. Then, just in the moment to write, I realized that it’s not so easy to merge Personal Characteristics and Technical Skills. This way, I decided to slipt this analysis in these two topics. As a consequence, in two posts. 🙂

By the way, after this “research” and the results below, but before this post, I quickly read the ebook “How to Become an Exceptional DBA” (2nd edition), by Brad McGehee. I really recommend it. I liked and I suppose you will too.

Another thing to say is that the lists could be infinite. So, I decided to keep my lists just in the “Top 8”. Here it goes what a listed before the search:

DBA’s most important characteristics:
(by Matheus)

1) Passionate
The DBA must to love his job. Have “light in their eyes”, something like excitement about the future. This is the best way to keep motivated, enthusiastic himself.

2) Committed
To have confidence in DBA promises and deadlines is a key factor. The DBA must understand the importance of his job for the health of the IT systems and the business, assume his responsibilities be reliable about everything and everyone. Trustworthy question.

3) Willfull
Something like “be always available to get up at 3:00 AM to help someone with a problem that is not directly your business”. Also counts keep available to help anyone with “just a little SQL doubt”, “just a little query”, “just a little grant” or “just a little project”… You know, embrace any kind of problem and goes right to the solution without any credits/glory behind it. Anyway, it’s just your job. Attitude and proactivity are a keywords too.

4) Innovator
Embraces the change and the challenges. The main difference between the creativity and innovation is that the second really make it happen. The DBA has to read, study, create but, the most important, implement new ideas, processes, tools. If it doesn’t work, it just try again and again. This is the evolution path. And the DBA has to pavement it.

5) Bookish / Like to Study
The DBA will be always a reference in the team. So, is his job to keep “fresh”, reading and having assertiveness answers for the developers, the business stakeholders, the or just the curiousness of anyone. It’s part of the “get confidence” process.

6) Ethics
Is not needed to say that DBA is always working with high critical data and buniness sensitive information. So, is not needed to spend more words to explain how is important this “characteristic”.

7) Communicative
DBA usually spend more time explaining, planning and justifying his actions that more properly doing the actions. Is a huge difference between a DBA and a Developer, in my point of view: The DBA spends hours thinking about a problem and understanding what is really happen, for correct with one or two lines of commands, on the other hand the Developer usually spends seconds or minutes to understand the problems and hours coding and testing the solution. Is not rare that the “most senior” DBA keeps in touch with “high hierarchies” to pass status report of crisis and “upswinged” problems. Make reports is another usual task. So, express verbally and write well is a potential difference between excellent and just “OK” DBAs, in my point of view.

8) Talented
No way out, the DBA must be talented to play well. Be a natural problem solver, detail oriented, realistic, patient, organized, assertive or good decision maker, keep calm under pressure, business minded, etc. Usually DBA is a experienced professional, so to have good mentoring skills and usually be ‘natural leaders’ are some decisive factors to. In summary, the DBA was ‘born to be wild’. Don’t you think like that?

Let’s finally see what a found. Below all the authors, you will have the link where I read the topics.
I choose 5 international recognized personas and 2 brazilian bloggers, because I believe the key of success is to join experienced and recognized but have to look intern and valorize our goods. Also because I believe that, being Brazilian, they probably talk something specific or cultureless useful to me and other Brazilian readers… 🙂

# Bourleson
– Excellent comunication skills
– Formal education
– Real-world experience
– Knowledge of database theory

# Brad McGehee
– Enjoys Technology
– Enjoys Challenges
– Good with Details
– Embraces Change
– Enjoys Learning
– Accepts Responsibility
– Maintains Professionalism
– Trustworthy
– Dependable
– Can Work as Part of a Team
– Can Communicate Effectively
– Listens Well
– Realistic
– Patient
– Enthusiastic

# Greg Larsen
– Problem Solving Skills
– Mentoring Skills
– Automating Everything
– Looking for Process Improvement Efforts
– Following a Standard Methodology
– Attitude
– Community Oriented
– Ethical
– Prioritizing Work Correctly
– Leadership skills
– Communication Skills
– Customer Service

# John Sansom
– Excellent Attention to Detail
– A Natural Problem Solver
– Assertive
– Tactful
– Manage Relationships
– A Good Decision Maker
– Humble
– Calm Under Pressure
– Business Minded
– Approachable

# Alan Hughes
– Organization Skills
– Technical Skills
– Interpersonal Skills
– Reading/Writing Skills

# Fernando Gazioli (BR)
– Confiança (Confidence)
– Pró-atividade (Proactivity)
– Bom Relacionamento (Good Relationship)
– Organização (Organizing skills)
– Curiosidade (Curiousity)

# Tiago Gouvêa (BR)
– Raciocínio Lógico (Logic)
– Autodidata (self-taught)
– Solucionador de Problemas (Problem Solver)
– Inglês (English)
– Gosta de Aprender (Enjoys Learning)

The final rating (top 8), grouping by similarity is something like:

Confident/Ethics/Professional/Responsible: 5 votes
Communicative/Good Relationship: 5 votes
Logic/Natural Leader/Mentoring/Assertiveness/Decision Maker/ Calm (in summary: Talented): 5 votes
“Problem Solver”: 4 votes
Curious/ Enjoys Learning/Self-taught: 4 votes
Embraces changes/challenges/process improvements: 4 votes
Enthusiastic/Proactive/Attitude: 4 votes
Detail-oriented: 3 votes

Do you liked this post?
I suppose you can like the Eduardo Morelli speech (05/21/2015!) too:

Take a look.

GrepOra Team

As already spoken, we are a group of friends that are crazy enough to share our experiences with you and with Oracle community as a payback of our own consumption.

In the next pages you are going to see some of our background and brief description professionally talking. So, by now, we are only going to share some photos of our occasional meetings.

(Maiquel, Matheus, Cassiano, Jackson, Dieison and Rafael)
(First GrepOra meeting)

(Maiquel, Rafael, Jackson, Matheus, Dieison and Cassiano)
(Last GrepOra Meeting – by now)

And this is it!
We hope you enjoy the book and the experience.

Let us know what you think about the book and the blog. Reach us out in social media like LinkedIn and Twitter. Collaborate and engage to Community!


About the Book


Welcome to our book, our blog and our world to have fun and view/review/learn/laugh with some of our struggles and personal notes for ourselves in the future.

Those posts are basically our notes with some of ours discovers and tips to review in the future. I believe everyone who works with that kind of technology have some personal notes, right? So, ours are being published to share with you.

We believe in sharing and mutual growing, so feel free to reach us to share your notes and tips, to fix anything you think to be wrong or can be better explained or everything. This is not only GrepOra team’s blog. This is our blog. Which includes you.

Ok then. But we are publishing a book? Just why? Who is the target audience? How should I read it? How is it structured? What should I expect?


This week we are completing 2 Years since the blog was created (in that time, called MatheusDBA). And we decided to review our best moments in these last years and compile them for you. It’s, above all, a good opportunity to refresh some posts that are still actual.

For who:

We are compiling it as a best moments review to engage new readers with the best past posts and reach that readers that enjoy to read a book in their mobile reading devices. Actually, we believe that writing material for this kind of media is the future (or the present), so if you prefer to read PDF files in you Kindle, Ipad, or similar, specially for those who prefer the offline mode to not being bothered by social media notifications, instant messages and other: This is for you. 🙂

How to read:

This is a book generated by the best posts in the blog. If you read the blog you know that the posts are not continuos and mostly have not relation between them. So, this is a book to read some curiosities and tips, to learn and review some useful stuff and to be aware about some daily basis challenges and struggles on working with Oracle technologies. This is not a book to be read in sequence, chapters or something like this. Feel free to read whatever you want and whatever you feel it’s interesting for yourself and to get richer your own experience with Oracle techs… Simple like that.

The structure:

There is no boundaries for our posts and ideas. Of course we have specialities, but everyone can write about everything. So there is no chapters of any restrictedly fixed boundaries. However, to give a little sense, we kind of organized the posts by following this (using our blog categories):

  • Oracle Database, RAC and Dataguard;
  • ASM;
  • Datapump, RMAN, Exp/Imp;
  • Enterprise Manager;
  • Application and Middleware;
  • Golden Gate and Data Integrator;
  • Linux and Shellscripts;
  • Cloud Computing;
  • Heterogeneous Databases;
  • Web Development and APEX;
  • PL/SQL and SQL Scripts;
  • Errors and Bugs.

What to expect:

Basically: “To read some curiosities and tips, to learn and review some useful stuff and to be aware about some daily basis challenges and struggles on working with Oracle technologies”. But mostly: To have fun! This is a book written by Oracle geeks to Oracle geeks.

Welcome to our world!

Author: Cassiano Roloff

20151217100542Innovative in everything he does, Cassiano acts as Oracle DBA since 2007 and works everyday with APEX since 2009. Cassiano is a great teammate and is always willing to help someone and learn new things.

Below you can find his Certifications list.


Oracle Database 10g Administrator Certified Professional – OCP 10g
Oracle Database 10g Administrator Certified Associate – OCA 10g

Author: Jackson Costa

aaeaaqaaaaaaaaldaaaajdq1mjnjowy3lwjkmjytngqwns05njq2ltu0nzzlmdblmtrimqFocused on Fusion Middleware and Application technologies, Jack is friend of everyone and always available to reach out the others. Jack has good architecture comprehension and skills to manage solutions on different technologies.



Author: Rafael Nolio

rafael3Passionate Database Administrator, experienced as consultant on heterogeneous environments and always trying new ways to do everything. Great as teammate, Rafael is always available to discuss new ideas and innovation.

Below you can find his Certifications list.


Oracle DBA Certified Associate 11g
Oracle Specialist Implementation Certified 11g

Author: Dieison Santos

dieisonProfessional in the IT area since 2006, working with Oracle applications and database. Solid experience in installation, customization and performance tuning of Fusion Middleware products.

Below you can find his Certifications list.

linkedin-logo_318-50643 htps://

Oracle Certified Associate, Oracle WebLogic Server 11g System Administrator