I started my professional career over 25 years ago, developing apps based on Microsoft technology like Access, Visual Basic and SQL Server.

Later I’ve been involved in several projects that tackle different areas of Operational Research and Management Science like production planning and scheduling, supply chain management, sales management, wastage minimization.

For that purpose I’ve developed several programs in Fortran where I use different technologies like neural networks, Mixed-Integer programming, revised Simplex Method, ARIMA and other statistical methods.

I’ve also become a member of Operational Research Society.

My first experience with Oracle database started at early nineties, when I was still a student (Faculty of Electrical Engineering and Computing, University of Zagreb).

From that time I’ve been focus on troubleshooting, optimization, SW architecture, design and development of large heterogeneous systems based on Oracle and Open Source technology.

My main interests include how database engine works, logical and physical database design, Cost Based Optimizer, Java/JVM/SQL/WebLogic/Linux/AIX and PL/SQL optimization and everything else related to performance management with main goal to get most out of the current system.

I’ve been involved in several implementations of Oracle’s ERP e-Business Suite in SI Europe.

From 2006 I’ve been working with Oracle Retail product in one of the largest installations in Europe which I found is probably among the most demanding SW at the market, due to the nature of business processes in Retail industry and taking into account the size of the company for which I’m working for.

I am also a regular lecturer on Oracle User Group (OUG) conferences, where some of my lectures have been voted in top three lectures out of 114 registered.

I also won’t miss opportunity to describe Open Source tools/apps/languages and promote such solutions as, in many cases, far superior comparing with commercial competitors.

In 2017 I become a member of HIPEAC (European Network on High Performance and Embedded Architecture and Compilation) society.
On their conference held in Zagreb (May, 2017) I had a lecture titled – High Performance Computing in Retail Industry.

Currently I’m working as Oracle Performance Tuning Expert and Technical Solution Architect on Oracle Retail Suite implementation projects.

Besides, I’m most excited with exploring Machine Learning, AI and Big Data, which fit perfectly as technology complementary to Operational Research and Management Science, my favorite field of Computer Science.

My motto is: If it is all about more powerful servers, more memory, more CPU, faster storage and network, then companies will need only money to buy a new hardware, and no one would ever need expert engineer to optimize the enterprise stack.

Reality is a bit different.

I hope you will enjoy in reading my blog.

Oracle Retail Performance Tuning

Twelve years of work experience and numerous solved problems, especially from the Oracle Retail Price Management (RPM), Oracle Retail Merchandising System (RMS), Oracle Retail Sales Audit (ReSA), Retail Integration Bus (RIB) and Oracle Retail Batch Chain Optimization, this site is dedicated to enable you to profit the most from your investment in Oracle Retail in terms of licenses needed while achieving the users satisfaction.

Performance Troubleshooting

In complex IT systems, when the performance bottleneck problem shows up, It is crucial, instead of guessing and thinking, to know exactly where the real problem is and how to fix it.

With more then twenty years experience in performance tuning and troubleshooting on the largest projects in Europe, using various methods, you can find articles of how to correctly identify bottlenecks with solutions of how to fix it in optimum time.

Performance Tuning

This is the main area of my expertise.

I always want to pull out maximum from the existing systems, as new HW will never solve architecture/design or development issues.

With many thousands issues solved during my 20+ years in IT on the largest projects in Europe, with this site I’ll help you to build an efficient systems, with minimum investment, i.e. number of licenses and resources needed.

Many topics/technologies will be covered from the storage, OS (Linux, IBM AIX), Oracle database, Oracle Middle Tier, Oracle Retail Suite, Java/JVM, Open Source tools and applications.

System and software architecture

By covering many areas of Oracle and Open Source technology, you’ll find articles of how to built robust and scalable IT infrastructure system.

Design & Development

If you are developing mission critical system based on Oracle and open source technology, you’ll find articles in the following areas:

  • Planning and Installation of the Oracle SW
  • Database Design
  • SQL development
  • PL/SQL Development
  • Java/JVM
  • Security and Auditing
  • building Backup strategy
  • disaster recovery planning
  • building HA System (RAC, RAC One Node, Data Guard, WebLogic Domains clustering)
  • pre-production performance testing

Existing production systems maintenance

On existing systems you’ll find articles in the following areas:

  • performance troubleshooting and tuning
  • monitoring the production system
  • Patching and Upgrading
  • migration of existing systems on a new platform

My Expertise

Operations Research (Mathematical programming and modelling)

Oracle Retail Suite (RPM – Retail Price Management, RMS – Retail Merchandise System, ReSA – Retail Sales Audit, ReIM – Retail Invoice Matching, RIB – Retail Integration Bus)

Architecture & Design

Oracle Database

Oracle GRID & RAC

Oracle WebLogic

Oracle Service Bus (OSB)

IBM AIX and RedHat/Oracle Enterprise Linux (OEL)

Open Source tools and apps








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