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Self-Managing Database: Easy Upgrade

Session id: 40084. Self-Managing Database: Easy Upgrade. Tom Graves Consulting Member of Technical Staff Oracle Corporation. Oracle Database 10g Upgrade . Database upgrade is the process of transforming the internal Oracle database dictionary from one release to another

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Self-Managing Database: Easy Upgrade

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  1. Session id: 40084 Self-Managing Database: Easy Upgrade Tom GravesConsulting Member of Technical Staff Oracle Corporation

  2. Oracle Database 10g Upgrade • Database upgrade is the process of transforming the internal Oracle database dictionary from one release to another • Driven primarily through SQL and PL/SQL scripts • Very careful ordering of execution and dependencies • Must complete cleanly and correctly before the database can be used

  3. Oracle Database 10g Upgrade: Enhancements • Reduced Complexity • Component integration • Consolidation of steps • Single script to upgrade all components • Enhanced GUI tool to assist the upgrade • Database Upgrade Assistant (DBUA)

  4. Oracle Database 10g Upgrade: Enhancements • Analysis of database before upgrade to increase likelihood of successful upgrade • Pre upgrade information tool • Upgrade Performance Enhancement • Parallel recompilation of invalid pl/sql database objects on multiprocessor CPUs • Verification of database upgrade • Post upgrade status tool

  5. Reduced Complexity • Automaticly determines what components (e.g. Java, Spatial…) need to be upgraded and then performs all necessary upgrades in correct dependency order • All components in DBMS_REGISTRY • Prior to Oracle Database 10g, much of the component script invocation was manual

  6. Reduced Complexity • One measure of simplicity: Database Upgrade Guide documentation size is decreasing dramatically: • 8i 512 pages • 9i 484 pages – 111 steps total for RDBMS with all 9 components! • 9iR2 344 pages • 10g 230 pages - 6 steps!

  7. Prepare to Upgrade • Become familiar with the features of the new Oracle Database 10g release • Determine the Upgrade Path to the new release • Choose an upgrade Method • Choose an Oracle Home Directory • Prepare a Backup Strategy • Develop a test plan

  8. 10g Upgrade Paths • Direct upgrade from 9iR2 (9.2.0), 9i (9.0.1), 8i (8.1.7), 8.0.6 • If you are not at one of these versions you need to perform a “double-hop” Upgrade • E.g. 8.1.5 -> 8.1.7 -> 10.1.0 • 7.3.4 -> 9.2.0 -> 10.1.0

  9. Choose an Upgrade Method • Database Upgrade Assistant (DBUA) • The Database Upgrade Assistant is a graphical user interface (GUI) tool that interactively steps the user through the upgrade process and configures the database to run with the new Oracle Database 10g release. • Manual Upgrade • A manual upgrade consists of running SQL scripts and utilities from the command line

  10. Database Upgrade Assistant Advantages • Performs all necessary steps for the upgrade • Interacts with the DBA if decisions need to be made • Provides complete HTML report of the upgrade process • Significantly reduces database downtime

  11. Manual Upgrade Advantages & Disadvantages • Advantage: • Gives the DBA finer control over the upgrade process • Disadvantage: • More work • More error prone

  12. Pre Upgrade Analysis • Checks for certain known database, init.ora, etc settings that may cause upgrade to fail, and generates warnings • E.g. shared_pool_size init.ora parameter is too low • Utility runs in “old server” & “old database” context • Based on “posterity” database knowledge + needs of Oracle Database 10g • DBUA automatically performs any required actions

  13. Pre Upgrade Analysis • Database version and compatibility • Redo logs <4MB • Updated Parameters e.g. shared_pool_size • Deprecated (renamed) parameters • Obsolete parameters • Cluster check • Account Check

  14. Pre Upgrade Analysis • Names of Components in database e.g. JAVAVM, Spatial, etc • Tablespaces • Increase in size recommendations • New SYSAUX tablespace • Character set incompatibilities • Installed options • Upgrade time estimate

  15. Key DBUA Features • The Assistant automates the upgrade process by performing all the tasks you normally accomplish manually • Invokes the Pre Upgrade Information Utility and automatically makes appropriate adjustments (including tablespace, redo logs, etc) • Checks for adequate resources (disk space, rollback segments) • Creates mandatory tablespace SYSAUX • Optionally, backs up all necessary files. • Creates new configuration files (init.ora, spfile, listener) in the new Oracle home

  16. Key DBUA Features • During the upgrade process, the DBUA: • Runs all necessary scripts (pre-upgrade information utility, “u” script, post upgrade status utility) • Shows upgrade progress • Write detailed trace and logging files

  17. Key DBUA Features • Settings during upgrade • DBUA disables archiving during upgrade phase • Security features • DBUA locks new users in the upgraded database • RAC-DBUA • RAC-DBUA facilitates upgrade of 8.1.7, 9.0.1, 9.2 to 10.1.0 • Upgrade done on the cluster. All database and configuration files are upgraded on all the nodes in the cluster.

  18. Key DBUA Features • Customizable • ISV’s can customize DBUA to run their migration scripts • XML files driving the DBUA engine (created by pre upgrade information utility & post upgrade status utility) • Silent mode for single command upgrade dbua –silent –sid ora9idb [-backup <location>]

  19. Welcome Screen

  20. Select the database to upgrade

  21. Tablespace

  22. Log Files

  23. Create SYSAUX Tablespace

  24. Parallel Recompilation

  25. Database Backup

  26. Pre-Upgrade Summary Page

  27. Upgrade Progress

  28. Upgrade Results

  29. Upgrade Validation • New “Post Upgrade Status Utility” – utlu101s.sql • Queries component REGISTRY to determine upgrade status • Provides information about invalid/incorrect component upgrades • Provides script name to re-run if necessary • DBUA calls this script to display status and then takes corrective action

  30. Upgrade Validation • “OPEN UPGRADE” mode will suppress certain spurious and unnecessary errors • Catch and handle ORA-00942 on DROP TABLE • Automatically handles setting certain system parameters that can otherwise cause problems during upgrade (E.g. set job_queue_processes = 0) • DBMS_REGISTRY package and system table are used to record and manage information about all the component upgrades • E.g.SQL> select ... from dba_registry; • COMP_ID COMP_NAME VERSION STATUS • ------- ---------------------- ------- ------ • CATALOG Oracle10g Catalog Views 10.1.0.1.0 VALID

  31. Manual Upgrade • Install Oracle Database 10g • Analyze the existing database using pre upgrade information tool @rdbms/admin/utlu101i Make necessary adjustments based on feedback • Shutdown database • Switch to New Oracle Home

  32. Manual Upgrade • Startup Database SQL> startup upgrade • Create SYSAUX tablespace • Invoke the proper upgrade “u” script SQL> @rdbms/admin/u0801070 • Shutdown database • Startup database SQL> startup

  33. Manual Upgrade • Run utlrp SQL>@rdbms/admin/utlrp • Check upgrade status using post upgrade status tool SQL>@rdbms/admin/utlu101s

  34. What’s Next… • Improve after-upgrade confirmation • Improve recovery options • Improve upgrade performance • Reduce downtime for upgrades

  35. Next Steps…. • Visit our demo ground • “Self Managing Database: Easy Upgrade” In the database area.

  36. Reminder – please complete the OracleWorld online session surveyThank you.

  37. Q & Q U E S T I O N S A N S W E R S A

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