Hotsos Symposium Speaker – Gerwin Hendriksen

Gerwin Hendriksen is a returning Hotsos Symposium presenter.


Gerwin HendriksenGerwin Hendriksen has been working with Oracle technologies for more than fifteen years. He started work as a DBA at a consulting company in the Netherlands. After this, he worked for five years for Oracle in the role of Advanced Resolution Engineer. In this role, he specialized in performance and high availability for the Oracle database and Oracle E-Business Suite. In his time at Oracle, he gave several training classes in different countries. Later, Mr. Hendriksen joined IBM, and worked there for two years. At IBM, he worked as a Technical Consultant for several projects in different countries. He also gave training classes in the IBM JSC in Montpellier, and at several customer sites.

Currently, he is employed by codecentric in the Netherlands, where he is working as a Performance Architect. He has given several presentations about Oracle database performance and Oracle E-Business Suite performance. He has also given presentations for the Oracle User Group Holland, at the DBA Symposium in Holland (Planboard), at Oracle Open World 2008, at the Hotsos Symposium (2008, 2009, 2011) and at the UKOUG 2011 symposium. During these last mentioned presentations, he presented on his developed performance method "Method-GAPP". Gerwin is very busy with performance management, capacity planning, and E-Business Suite Performance.

Presentation Titles

"Method GAPP" Used to Mine OEM 12c Repository and AWR Data


This session will first briefly demonstrate how to use "Method-General Approach Performance Profiling" (Method-GAPP), which was introduced at Hotsos Symposium in 2008, to profile end-user response times and predict performance in multi-tier architectures. Business processes are influenced by many components like web servers, portal servers, Oracle Internet Directory servers, database servers, application servers, etc. The power of "Method-GAPP" is its ability to help you manage environments of arbitrary complexity, regardless of which technologies you've implemented.

This session will mainly focus on the value of data inside the OEM 12c repository and the available AWR data. This data is used by the Method, to see what is important for your specific business process response time for the end-user. By using the Method to mine the data, you will be able to find the most involved tiers in your architecture, what the most important SQL is, and what the most involved events are. After creating a model, by the use of "Method-GAPP", the end-user performance can be predicted based on the mined data.

The presentation will show results from actual customer experiences in SOA-based systems with more than three nodes. Also a complete case from the most recent "Method-GAPP" white paper will be explained and shown. The session will further show how the Method works and how important relations between available mined data and end-user response times can be found. The session will also show how the results can be used for your optimizations effort.

Presentation Materials

Presentation materials are available online to attendees only.


The speaker schedule is as follows: