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Full Name
Gayan Lokumanna
Full Name
ACE Associate
Top Level Details
Job Role
Snr. Director Data Architecture
Company
Millennium I.T.E.S.P (Private) Limited
Country
Sri Lanka
Top Expertise
Database 23ai
Focus Area
Database
About Gayan
<p>Skilled Data Technologist/Snr.Director/Consultant/Team Lead/Manager/DBA/Cloud Architect holding 3X Oracle Certified Master (OCM) & having 24+ years of technology experience including Oracle MAA, & Oracle Enterprise Manager, Database options, Heatwave MySQL, Exadata, Database Security, Disaster Recovery, Oracle Cloud Infrastructure (OCI) & Oracle enterprise Data Platform. Work experience includes Oracle Corporation, Pearson & Millennium Information Technologies Ltd. – part of London Stock Exchange Group (LSEG)</p>
Expertises
Database 23ai
AI Vector Search
Active Data Guard (ADG)
Advanced Compression
Automatic Storage Management (ASM)
Autonomous Database
Automatic Workload Repository (AWR)
Backup and Recovery
Cloud Migrations
Converged Database
Links
Latest Contributions
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ORA-15080: synchronous I/O operation failed to write block xxx of disk 0 in disk group DATAxx
Apr 08, 2026 - Blog post -
Oracle Database (EE)
Database 19c
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Unable to open PDB with ORA-600 [17287]
Mar 31, 2026 - Blog post -
Database 19c
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Quick AIDB Cool Tips for Developers
Mar 27, 2026 - Presentation - in-person or virtual - Oracle APEX AI Nexus Workshop at National Institute of Business Management (NIBM)
Structured Query Language (SQL)
Database 26ai
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Quick AIDB Tips for Developers
Mar 26, 2026 - Presentation - in-person or virtual - SLOUG - Oracle APEX AI DAY SPRING 2026
Database 26ai
Oracle True Cache
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Keynote : Shaping the Future of Development with AI
Mar 26, 2026 - Presentation - in-person or virtual - SLOUG - Oracle APEX AI DAY SPRING 2026
APEX on ADB
AI/ML
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Oracle Database 26ai Hot Topics - II
Mar 09, 2026 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 14
Database 26ai
Oracle True Cache
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Oracle EM 24Ai Repo DB setup with ASMLIB V3
Mar 04, 2026 - Blog post -
Automatic Storage Management (ASM)
Oracle Enterprise Manager (OEM)
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Oracle Database 26AI Hot Topics - 1
Feb 23, 2026 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 13
Oracle Database (EE)
Database 26ai
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Administration and Troubleshooting Tips
Feb 09, 2026 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 12
Database 19c
Database 23ai
Optimizer
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Managing optimizer bug fixes using DBMS_OPTIM_BUNDLE
Jan 27, 2026 - Blog post -
Installation / Patching
Database 19c
Oracle Base Database Service EE
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Database Security Fundamentals - Tips and techniques
Jan 19, 2026 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 11
Oracle Database (EE)
Database 19c
Database Security
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RMAN Backup Recovery Fundamentals
Jan 05, 2026 - Presenting - video/webinar - Getting Oracle Database Fundamentals Right - GODFR Series Day 10
Database 19c
RMAN Backup and Recovery
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RMAN Backup Fundamentals Session-2
Dec 22, 2025 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 9
Database
Oracle Database (EE)
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RMAN Backup Fundamentals - Session 1
Dec 15, 2025 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 8
Database
Oracle Database (EE)
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Instance Recovery
Dec 01, 2025 - Presentation - in-person or virtual - Getting Oracle Database Fundamentals Right - GODFR Series Day 7
Database 23ai
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