Oracle EBS database upgrade to 12c
- 1. Session ID: Prepared by: Best practices of Upgrading Oracle E-Business Suite database to 12c 10306 Vasu Balla, Pythian @r12dba
- 2. April 2-6, 2017 in Las Vegas, NV USA #C17LV About Me Vasu Balla • Oracle Apps Principal Consultant with Pythian • 15 Years of Oracle Apps DBA Experience • 10th Year with Pythian • Part of Oracle EBS ATG Customer Advisory Board • Based out of Ottawa, Canada • Presented at several Collaborate Conferences
- 3. April 2-6, 2017 in Las Vegas, NV USA #C17LV ABOUT PYTHIAN © 2014 Pythian Confidential 11,400 Pythian currently manages more than 11,400 systems. 400+ Pythian currently employs more than 400 people in 200 cities in 35 countries 1997 Pythian was founded in 1997 Global Leader In IT Transformation And Operational Excellence Unparalleled Expertise •Top 5% in databases, applications, infrastructure, Big Data, Cloud, Data Science, and DevOps Unmatched Certifications •9 Oracle ACEs, 4 Oracle ACE Directors, 1 Oracle ACE Associate •6 Microsoft MVPs, 1 Microsoft Certified Master •5 Google Platform Qualified Developers •1 Cloudera Champion of Big Data •1 Mongo DB Certified DBA Associate Level •1 DataStax Certified Partner, 1 MVP Broad Technical Experience •Oracle, Microsoft, MySQL, Oracle EBS, Hadoop, Cassandra, MongoDB, virtualization, configuration management, monitoring, trending, and more.
- 4. April 2-6, 2017 in Las Vegas, NV USA #C17LV Agenda • Overview of the Upgrade Process • Performance Issues Post Upgrade • Using AWR • Best Practices for optimal performance • Preferences
- 5. April 2-6, 2017 in Las Vegas, NV USA #C17LV Typical Upgrade Process • Install 12c Oracle Home • Install example CD • Apply latest PSU + recommended patches • Upgrade DB to 12c using CLI or DBUA • Complete post upgrade steps
- 6. April 2-6, 2017 in Las Vegas, NV USA #C17LV Basic checklist • Make sure your init.ora params as per recommendations • bde_chk_cbo.sql - EBS initialization parameters - Healthcheck (Doc ID 174605.1) • Make sure all required patches are applied • In addition to the Interoperability notes, apply patches from below note • Things to Consider to Avoid Poor Performance or Wrong Results on 12.1.0.2 (Doc ID 2034610.1) • EBS 11i customer make sure to set optimizer_adaptive_features=off ( missing in MOS note)
- 7. April 2-6, 2017 in Las Vegas, NV USA #C17LV Basic Checklist ( Contd…) • Avoid using memory_target (AMM), as its not compatible with hugepages • Use sga_target ( ASMM) with fixed db_cache_size, shared_pool_size etc to avoid excessive resize operations • This will ensure that buffer cache or shared pool area don’t get resized below the db_cache_size and shared_pool_size parameters
- 8. April 2-6, 2017 in Las Vegas, NV USA #C17LV Performance Issues Post DB Upgrade • Very common issues reported to DBA post upgrade • Long running report • A particular form responding slow • OA Framework page just spinning • Most of these issues are causing by Oracle picking up bad execution plan for a particular SQL • AWR is best tool to solve this problem
- 9. April 2-6, 2017 in Las Vegas, NV USA #C17LV AWR Architecture
- 10. April 2-6, 2017 in Las Vegas, NV USA #C17LV Using AWR • Increase AWR retention period from default 8 days to at least 45 days • Decrease AWR snapshot interval to 15mins from default 60mins • This will ensure that we have at least one month end closing activity recorded in AWR at more granular level
- 11. April 2-6, 2017 in Las Vegas, NV USA #C17LV Identify the bad SQL • If the issue is in progress, then identify the offending SQL using EM or from backend old fashioned way of tracing a session • If the issue happened in the past, then try to run an AWR/ASH report for that time frame and identity the SQL
- 12. April 2-6, 2017 in Las Vegas, NV USA #C17LV Once SQL_ID is identified • Follow Maris Elsin’s approach to analyze the plan and create baseline using good plan from AWR Get the SQL from github - https://github.com/MarisElsins/TOOLS/tree/master/SQL/AWR
- 13. April 2-6, 2017 in Las Vegas, NV USA #C17LV SQL Plan Baseline from AWR https://www.slideshare.net/mariselsins/mining-awr-v2-trend-analysis
- 14. April 2-6, 2017 in Las Vegas, NV USA #C17LV Best practices • Preserve Good execution plans using custom job scheduled via dbms_scheduler, As not all good plans are captured by AWR. Refer https://www.slideshare.net/mariselsins/mining-awr-v2-trend-analysis • Gather database statistics using Oracle E-Business Suite built-in program “Gather Schema Statistics” • Use estimate percent Zero • Lock stats on GT tables (FND_EXCLUDE_TABLE_STATS) • Schedule Separate Workflow Background Process job with Timeout and Stuck option, just once a day
- 15. April 2-6, 2017 in Las Vegas, NV USA #C17LV References • Interoperability Notes Oracle EBS 12.2 with Oracle Database 12c Release 1 (Doc ID 1926201.1) • Interoperability Notes EBS 12.0 or 12.1 with RDBMS 12cR1 (Doc ID 1524398.1) • Interoperability Notes EBS 11i with RDBMS 12cR1 (Doc ID 1524399.1) • Database Patches Required by Oracle E-Business Suite on Oracle Engineered Systems: Exadata Database Machines and SuperClusters (Doc ID 1392527.1) • Database Initialization Parameters for Oracle E-Business Suite Release 12 (Doc ID 396009.1) • Database Initialization Parameters for Oracle Applications Release 11i (Doc ID 216205.1) • bde_chk_cbo.sql - EBS initialization parameters - Healthcheck (Doc ID 174605.1)
- 16. Q&A
- 17. Please Complete Your Session Evaluation Evaluate this session in your COLLABORATE app. Pull up this session and tap "Session Evaluation" to complete the survey. Session ID: 10306