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Stefan Freundt

Support Oracle Administration and Tuning

Kirchseeon, Germany
Experience Education Certifications Languages
Experience
Feb 2017 - Present
8 years 6 months
Germany

Support Oracle Administration and Tuning

Bayerisches LKA

  • Administration, Oracle RAC, Oracle ASM
  • Tools: Oracle 11g, Oracle 12c, PL/SQL, SQL, SQL*Plus, Oracle RAC, Oracle ASM, check_mk, Namis, Oracle Cloud Control, Apache Tomcat, WildFly, Oracle WebLogic Server (WLS)
Jan 2017 - Jan 2017
1 month
Kirchseeon, Germany

Proof of Concept with Oracle 12c, Evaluating Old and New Options

Star512 Datenbank GmbH

  • Data warehouse (DWH), Business Intelligence (BI), Administration
  • Tools: Oracle 12c, PL/SQL, SQL, SQL*Plus
  • PoC on: table statistics local and global, extended star schema and bitmap indexes
Feb 2016 - Dec 2016
11 months
Germany

Business Intelligence Development, Unloading Large Data Volumes

Kabel Deutschland - Vodafone GmbH

  • Business Intelligence development and production
  • Tools: Oracle 12c, SQL Developer, PL/SQL, SQL, Oracle Exadata, Exadata Smart Scan, Oracle Exadata Flash Cache, Oracle In-Memory
  • Unloading large data volumes
  • AWR reports, SQL trace, TKPROF
  • Experience with Oracle GoldenGate, Oracle-to-Oracle and MySQL-to-Oracle replication
  • Java 1.8
  • Control-M job scheduling
  • Evaluated 12c new features
Feb 2016 - Jun 2016
5 months
Germany

Database and SQL Tuning of CRM Database

O2 - Telefonica

  • (20 days)
  • Development
  • Tools: Oracle 12c, AWR reports, SQL trace, TKPROF, Toad
  • Code review of PL/SQL code
Jan 2016 - Jan 2016
1 month
Germany

Oracle Administration, Database Tuning and Monitoring

Integrata / msg-life

  • Training
  • SQL trace, TKPROF, V$ views, optimizer, statistics and hints, memory optimization, I/O optimization, locks and contention
  • Tools: Oracle 12c, AWR reports, SQL trace, TKPROF, SQL Developer
Dec 2014 - Dec 2015
1 year 1 month
Munich, Germany

Upgrade/Migration Oracle 11g to Oracle 12c

Munich Re / Fujitsu Munich

  • Created migration scripts/documentation to upgrade ~200 Oracle 11g databases to 12c
  • Migrated first 10 databases
  • Split into individual projects
  • Supported Indian operations team in migration (in English)
  • Used Container and Pluggable Databases
  • Implemented Oracle Enterprise User Security for centralized user management
  • Transparent Data Encryption for backup encryption
  • Used wallets
  • DB Vault and realms (infrastructure vs application DBA separation)
  • Application tuning, SQL tuning, table design optimization (adding a temp table sped up a key statement by factor 10)
  • Used Oracle Enterprise User Security to map Active Directory users to a shared DB user
  • Data Guard for high availability and failover
  • In-Memory database
  • Issue: statement ran too long
  • Solution: analyzed table design and execution plan, created temp table and used it in app to speed up by 10x
  • Tools: Data Pump (expdp, impdp), SQL*Plus, Toad, SQL Developer, Oracle Cloud Control, bash, ksh
Nov 2011 - Nov 2011
1 month
Erding, Germany

Oracle Database Tuning

MD-Consulting

  • Training
  • SQL trace, TKPROF, V$ views, optimizer, statistics and hints, memory optimization, I/O optimization, locks and contention, parallel query
  • Tools: Oracle 11g, AWR reports
Nov 2011 - Nov 2011
1 month
Hamburg, Germany

Oracle Database Tuning and Monitoring

Unilog Integrata

  • Training
  • SQL trace, TKPROF, V$ views, optimizer, statistics and hints, memory optimization, I/O optimization, locks and contention, parallel query
  • Tools: Oracle 11g, AWR reports
May 2009 - May 2009
1 month
Berlin, Germany

Oracle Administration and Backup & Recovery

DLR

  • Training
  • Storage structure, file structure, user management, archiving, backup & recovery
  • Tools: Oracle 11g, RMAN, AWR reports
May 2008 - May 2008
1 month
Nürtingen, Germany

Oracle Tuning Workshop

Bürotex

  • Training
  • SQL trace, TKPROF, V$ views, optimizer, statistics and hints, memory optimization, I/O optimization, locks and contention, parallel query
  • Analysis of customer-specific statements
  • Tools: Oracle 11g
Jan 2007 - Dec 2014
8 years
Munich, Germany

Replace Oracle Middleware with Red Hat Middleware

T-Systems for Toll-Collect

  • Large project for T-Systems/Toll-Collect
  • Replaced central Oracle iAS/BPEL/ESB middleware with Red Hat Fuse Middleware (Fuse ESB 7.1, JBoss 6.1)
  • Middleware administration
  • Workshops on middleware operation
  • Messaging system
  • Installation, operation, and emergency plan documentation
  • Software delivery deployment
  • Tools: Oracle OAI, Oracle ESB 10.1.3.5, Oracle BPEL, Red Hat Fuse 7.1, JBoss 6.1, JON, OpenJDK 7, RHEL 6.5, JVM, Apache Tomcat, JFrog Artifactory, certificates, ActiveMQ, Message Broker, SOAP, XML/XSD, Git client, Visio
  • Middleware highlight: solved intermittent Oracle BPEL error in test by adding CPUs
Mar 2006 - Mar 2006
1 month
Munich, Germany

Oracle Administration and Backup & Recovery on Linux

Unilog-Integrata

  • Training
  • Tools: Oracle 10g
Feb 2006 - Feb 2006
1 month
Dresden, Germany

Database and SQL Tuning Training

Landesamt für Finanzen

  • Training
  • SQL trace, TKPROF, V$ views, optimizer, statistics and hints, memory optimization, I/O optimization, locks and contention, parallel query
  • Analysis of customer-specific statements
  • Tools: Oracle 10g / 9i
Nov 2005 - Nov 2005
1 month
Leipzig, Germany

Oracle Administration and Backup & Recovery on Linux

Unilog-Integrata

  • Training
  • Oracle installation, storage management, filesystem
  • Tools: Oracle 9i
Nov 2004 - Nov 2004
1 month
Mannheim, Germany

Speaker

DOAG (German Oracle User Group)

Mar 2004 - Dec 2015
11 years 10 months
Munich, Germany

Large Truck Toll Project

T-Systems, Toll-Collect

  • Team of 25 for 350 databases
  • Performance and error analysis of Oracle apps
  • SQL performance analysis, debugging, SQL trace, TKPROF
  • Long-running anonymizations on 100M+ row tables
  • Latch-free waits
  • App error analysis (infinite loops from simple SQL)
  • Data inconsistency fixes
  • SQL tuning, execution plan analysis, optimizer hints
  • Index design (B-tree, bitmap, function-based)
  • Parallel queries, partitioning, materialized views with query rewrite
  • Group by rollup and cube
  • Change data capture triggers
  • DB admin: creation, patching, backup/recovery, network configs, listener, service requests
  • Clusters: Solaris failover, RHEL VMware
  • Documentation and workshops
  • OS setup, silent installs, migrations, patch installs
  • Time zone, NLS check
  • Init.ora and spfile management
  • Monitoring, archive, standby with Data Guard, flashback
  • RMAN, LogMiner, transportable tablespaces, datapump, endian conversion
  • Users, roles, profiles, session kill
  • Tablespace management, reorg
  • SQL & PL/SQL development, triggers, procs
  • LOB management and reorg
  • Advanced queuing, replication, DB links
  • Grid/Cloud Control
  • Shell scripting
  • Workshops on SQL tuning, new features
  • Highlights: resolved enq HW contention for LOBs, cut middleware costs, migration Solaris→Linux, recovered deleted redo logs, tuned direct write waits, 5x test throughput with flashback, optimized anonymization, forced full scan to speed up
  • Tools: Oracle 8.1.7.4–12.1, RMAN, Data Guard, standby, PITR, console/grid/cloud control
  • Managed 350 DBs, TB-scale DWH and 200 commits/sec, Cognos DB, PL/SQL
Feb 2004 - Feb 2004
1 month
Esslingen, Germany

Design and Implement Backup & Recovery Strategy

Bechtle-Verlag, TOP21

  • Administration, backup & recovery
  • Tools: Oracle 8.1.5, 9.2.0, RMAN, Data Guard, Oracle FailSafe
Feb 2004 - Feb 2004
1 month
Munich, Germany

Oracle Database Administration and Backup & Recovery Strategy

Unilog Integrata

  • Various
  • Tools: Oracle 9.2, SQL*Plus, RMAN
Jan 2004 - Jan 2004
1 month
Esslingen, Germany

Crash Recovery, Corrupt Block Recovery

Bechtle-Verlag, TOP21

  • Publishing
  • Tools: Oracle 8.1.5, Export, Import, DBMS_REPAIR
Jan 2004 - Jan 2004
1 month
Frankfurt, Germany

Tuning Workflow Application on Oracle Database

Standard Life Insurance

  • Insurance, workflow
  • Tools: Oracle 9.2, SQL*Plus, Perfstat/Statspack, Toad
Jan 2004 - Jan 2004
1 month
Ratingen, Germany

Oracle Database Administration and Backup & Recovery Strategy

Vodafone, Sun

  • Telecommunications
  • Tools: Oracle 9.2, SQL*Plus, RMAN
Dec 2003 - Dec 2003
1 month
Frankfurt, Germany

Oracle Development and Administration

Atos Origin

  • Credit card billing, payments
  • Tools: Oracle 9.2, SQL*Plus, Enterprise Manager
Dec 2003 - Dec 2003
1 month
Frankfurt, Germany

Oracle Tuning

Unilog Integrata AG

  • Tools: Oracle 9.2, Enterprise Manager, Performance & Diagnostic Pack, Perfstat/Statspack, STAR-Query, materialized views, partitioning, optimizer hints, tracing and diagnosis
Nov 2003 - Nov 2003
1 month
Paderborn, Germany

Oracle Administration and Tuning

Peacock GmbH

  • Tools: Oracle 9.2, Enterprise Manager, Performance & Diagnostic Pack, Perfstat/Statspack, STAR-Query, materialized views, optimizer hints
Nov 2003 - Nov 2003
1 month
Stuttgart, Germany

Oracle Administration, Migration and Tuning

Unilog Integrata

  • Tools: Oracle 8.1.7, 9.2, Enterprise Manager, Performance & Diagnostic Pack, Perfstat/Statspack
Oct 2003 - Oct 2003
1 month
Wiesbaden, Germany

Oracle Administration and Backup & Recovery

Sparkassenversicherung

  • Tools: Oracle 8.1.7, SQL*Plus
Oct 2003 - Oct 2003
1 month
Berlin, Germany

Oracle Installation, Administration and Backup & Recovery

Vodafone AG

  • Tools: Oracle 8.1.7, 9.2, Solaris
Sep 2003 - Dec 2003
4 months

Develop Course Materials for Oracle on Linux

Unilog Integrata

Sep 2003 - Sep 2003
1 month
Lingen, Germany

Support, Crash Recovery with Undocumented init.ora Parameters

Erwin-Müller-Gruppe

  • Tools: Oracle 8.1.7
Sep 2003 - Sep 2003
1 month
Stuttgart, Germany

Install/Evaluate Oracle 9i RAC, Beta Test Oracle 10g

Oracle / HP / NetApp

  • Tools: United Linux 8, Oracle 9.2, 10g
Sep 2003 - Sep 2003
1 month
Wiesbaden, Germany

Oracle Tuning and Automation

Sparkassenversicherung

  • Tools: Oracle 8.1.7, Enterprise Manager, SQL*Plus scripts, Perfstat/Statspack, statistics, optimizer hints
Sep 2003 - Sep 2003
1 month
Cologne, Germany

Oracle Administration, Migration and Tuning

Unilog Integrata

  • Tools: Windows 2000, Oracle 9.2, Enterprise Manager, Perfstat/Statspack, STAR-Query, materialized views, partitioning, optimizer hints
Jul 2003 - Jul 2003
1 month
Lippstadt, Germany

Oracle Administration and Backup & Recovery

GIS mbH

  • Tools: SQL*Plus, Enterprise Manager
Jul 2003 - Jul 2003
1 month
Wiesbaden, Germany

Oracle SQL and Administration

Hessische Zentrale Datenverarbeitung (HZD)

  • Tools: SQLPlus, SQLPlus scripts
Jul 2003 - Jul 2003
1 month
Wiesbaden, Germany

Oracle Administration, Oracle Migration

Sparkassenversicherung

  • Tools: Windows 2000, Oracle 8.1.7 to 9.2
Jul 2003 - Jul 2003
1 month
Bonn, Germany

Install Oracle FailSafe

Stadtwerke Bonn

  • Tools: Oracle FailSafe Manager
Jun 2003 - Jun 2003
1 month

Oracle 9i New Features Workshop

Unilog Integrata AG

Jun 2003 - Jun 2003
1 month

Oracle Administration and Backup & Recovery

Unilog Integrata AG

  • Tools: SQL*Plus, Enterprise Manager
May 2003 - May 2003
1 month
Kempten, Germany

Oracle Spatial / GIS Database

Riwa GIS mbH

May 2003 - May 2003
1 month

Oracle Administration and Enterprise Manager

Unilog Integrata

May 2003 - May 2003
1 month

Oracle PL/SQL Programming

Unilog Integrata

  • Tools: SQL*Plus, PL/SQL
Apr 2003 - Apr 2003
1 month
Berg, Germany

Oracle Installation and Tuning

MD Consulting

  • Tools: Windows 2000, Oracle 9.2
Apr 2003 - Apr 2003
1 month
Paderborn, Germany

Oracle Backup & Recovery

Peacock

Apr 2003 - Apr 2003
1 month
Kempten, Germany

Oracle Spatial / GIS Database

Riwa GIS mbH

Mar 2003 - Mar 2003
1 month

Oracle New Features / Tuning

Guardus Solutions AG

Mar 2003 - Mar 2003
1 month
Munich, Germany

Install Oracle Standby Database on Solaris

Materna Information & Communication

  • Tools: Oracle 9.2, Solaris 8
Feb 2003 - May 2003
4 months

Develop Course Materials for Oracle Cluster: Standby DB, FailSafe, Parallel

Unilog-Integrata

Feb 2003 - Feb 2003
1 month
Germany

Install/Workshop Oracle 8.1.7 and 9.2

Landesamt für Umweltschutz

  • Tools/Languages: Windows 2000, ArcServ backup tool
Feb 2003 - Feb 2003
1 month

Install/Evaluate Oracle RAC 9i on Linux

Oracle / Fujitsu Siemens

Feb 2003 - Feb 2003
1 month

Oracle SQL

Unilog Integrata

  • Tools: SQL*Plus
Feb 2003 - Feb 2003
1 month

Oracle Tuning

Unilog Integrata

  • Tools: Perfstat/Statspack, Enterprise Manager, Diagnostic Pack
Jan 2003 - Jan 2003
1 month
Amberg, Germany

Install/Train/Commission Standby Database

Bayerische Justiz

  • Tools/Languages: Oracle 9.2.0, Solaris 8
Jan 2003 - Jan 2003
1 month
Munich, Germany

Install Oracle Server and Internet Application Server

Netexpress

  • Tools/Languages: Oracle 9.2.0, Suse Linux 8
Dec 2002 - Dec 2002
1 month

Oracle Administration Course

Unilog Integrata

Nov 2002 - Nov 2002
1 month
Wiesbaden, Germany

Oracle Administration Workshop

Sparkassenversicherung

  • Tools/Languages: Oracle 8.1.7, Windows NT, SQL*Plus
Oct 2002 - Oct 2002
1 month

SQL Tuning

Bertelsmann / Nionex

  • Tools/Languages: Oracle 8.1.7.4, Windows NT, Solaris, Toad, optimizer hints
Sep 2002 - Oct 2002
2 months
Amberg, Germany

Install Oracle on Solaris, Configure Standby DB

Bayerische Justiz

  • Tools/Languages: Oracle 9.2.0, Solaris 8
Jun 2002 - Jun 2002
1 month

SQL Tuning

Karstadt/Quelle (Itellium)

  • Tools/Languages: Oracle 8.1.7, HPUX, Toad
Mar 2002 - Mar 2002
1 month

Database Tuning (Memory Tuning)

Eurolog AG

  • Tools/Languages: Oracle 8.1.6, HPUX, Perfstat/Statspack
Dec 2001 - Jan 2002
2 months

Oracle Administration

Hewlett & Packard GmbH

Dec 2001 - Jan 2002
2 months

Oracle Administration

Materna Information & Communication

Nov 2001 - Nov 2001
1 month
Mannheim, Germany

Speaker

DOAG (German Oracle User Group)

  • "Silent installation via response file"
  • "Undo management = auto... no more rollback issues"
Nov 2001 - Nov 2001
1 month

Oracle FailSafe (Active/Passive Cluster) Installation

Landeszentralbank Bayern

  • Tools/Languages: Oracle 8.1.7, Windows 2000
Sep 2001 - Sep 2001
1 month

Database Tuning

Landeszentralbank Bayern

  • Tools/Languages: Oracle 8.1.7, Windows NT/2000
Jun 2001 - Jun 2001
1 month

Silent Oracle Installation via Response File

Landeszentralbank Bayern

  • Tools/Languages: Oracle 8.1.7, Windows NT
Jun 2001 - Jun 2001
1 month
Berlin, Germany

Speaker

Oracle Open World

  • "Database Tuning"
  • "Oracle 9i New Features"
Dec 1997 - Sep 2001
3 years 10 months
Munich, Germany

Trainer, Oracle University

Oracle Deutschland GmbH

  • Trainings on:
  • Oracle SQL (5 days)
  • Oracle Database Administration and Backup & Recovery (10 days)
  • Oracle Database Tuning (5 days)
  • Oracle on Windows (2 days)
  • Oracle for SAP Administrators
Languages
German
Native
English
Advanced
Russian
Advanced
Education
Lorem ipsum dolor sit amet

PhD, Semiconductors / Ultrashort Pulse Lasers / Optics · Physics

Certifications & licenses

Oracle Certified Professional 9i

Oracle Certified Professional 8.1.7

Oracle Certified Professional 8.0.5

Oracle Certified Professional 8i

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