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Agenda
• Sneak Peek at Oracle Database 11g• Management Enhancements• Availability Enhancements• Performance Enhancements• 11g New Features Summary
3
Oracle Database 11g Change Assurance Capabilities
Capture &Replay
Workload
Set Up TestEnvironments
PerformOnline
Application Upgrades
Detect &Tune
PerformanceChanges
ManageExecution
PlanEvolution
PackageIncidents
forSupport
OnlineHot
Patching
4
Snapshot Standbysfor Test Environments
• Convert Physical Standby to Snapshot Standby and open for writes by testing applications
• ALTER DATABASE CONVERT TO SNAPSHOT STANDBY;
• Discard testing writes and catch-up to primary by applying logs
• ALTER DATABASE CONVERT TO PHYSICAL STANDBY;
• Preserves zero data loss • But no real time query or fast
failover• Similar to storage snapshots, but:
• Provides DR at the same time• Single copy of storage
Physical Standby Apply Logs
Snapshot Standby Perform Testing
Open Database
Back out Changes
Continuous Redo Shipping
5
Database Replay
• Capture Workload in Production• Capture production workload with actual load & concurrency• Move the captured workload to test system
• Replay Workload in Test• Make the desired changes in test system• Replay workload with production load & concurrency
• Analyze & Report• Errors• Data divergence • Performance divergence
• Use ADDM, AWR for further performance analysis
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Pre-Change Production System
ClientClient
…
App ServerApp ServerApp Server
Client
Backup
…
Captured WorkloadProcess Process Process…
Capture Workload
Changes Unsupporte
d
Changes Supported
•Database Upgrades, Patches
•Schema, Parameters
•RAC nodes, Interconnect
•OS Platforms, OS Upgrades
•CPU, Memory
•Storage
•Etc.
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Post-Change Test System
…Replay Driver
………
App ServerApp ServerApp Server
…
Process Process Process… Process Process Process…
Can use Snapshot Standby as test system
Replay Driver
ClientClient
…Client
Pre-Change Production System
Processed Captured Workload
Backup
Capture Workload
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Capturing the SQL Workload
9
SQL Replay
• Focus on impact of change on SQL query workload• Capture SQL in Production
• Automatically capture SQL workload over a specified period• Capture SQL text, plans, bind variables, execution statistics• Can capture 10.2 SQL workload• Move captured SQL workload to test system
• Replay SQL in Test• Replay SQL in pre and post-change configurations• Compare and analyze performance• For regressed SQL, use SQL Tuning Advisor (10g) to improve
performance with SQL Profiles• Changes supported
• Major & minor database releases, patches, parameters, schema, optimizer statistics, tuning recommendations
10
SQL Replay Performance Analysis
14
Automatic SQL Tuning Configuration
17
Automatic SQL Tuning Results Recommendations
20
New Change Assurance Capabilities in Oracle Database 11g
Capture &Replay
Workload
Set Up TestEnvironments
PerformOnline
Application Upgrades
Detect &Tune
PerformanceChanges
ManageExecution
PlanEvolution
PackageIncidents
forSupport
OnlineHot
Patching
21
Online Application Upgrade
• Large, mission critical applications are often unavailable for tens of hours while a patch or an upgrade is installed
• Oracle Database 11g introduces revolutionary new capabilities that allow online application upgrade with uninterrupted availability of the application
• The pre-upgrade application and the post-upgrade application can be used at the same time
• End-user sessions therefore enjoy hot rollover
22
Online Application Upgrade The challenge
• The installation of the upgrade into the production database must not perturb live users of thepre-upgrade application
• The changes must be made in privacy
• Transactions done by the users of the pre-upgrade application must by reflected in the post-upgrade application
• For hot rollover, we also need the reverse of this:
• Transactions done by the users of the post-upgrade application must by reflected in the pre-upgrade application
23
Online Application Upgrade How did we do it?
• Evolutionary capability improvements
• Some table DDLs that used to fail if another session had outstanding DML now always succeed
• Others, that cannot succeed while there’s outstanding DML, are now governed by a timeout parameter
• Online index creation and rebuild now never wait
• The dependency model is now fine-grained:e.g. adding a new column to a table, or a new subprogram to a package spec, no longer invalidates the dependants
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Online Application Upgrade Revolutionary new capabilities
• 11.1 brings the edition, the editioning view, and the crossedition trigger
• Code changes are installed in the privacy of a new edition.
• Data changes are made safely by writing only to new columns or new tables not seen by the old edition
• An editioning view exposes a different projection of a table into each edition to allow each to see just its own columns
• A crossedition trigger propagates data changes made by the old edition into the new edition’s columns, or (in hot-rollover) vice-versa
25
New Change Assurance Capabilities in Oracle Database 11g
Capture &Replay
Workload
Set Up TestEnvironments
PerformOnline
Application Upgrades
Detect &Tune
PerformanceChanges
ManageExecution
PlanEvolution
PackageIncidents
forSupport
OnlineHot
Patching
26
SQL Plan Managementcontrolled plan evolution
Business Requirement• Data is changing over time
• Statistics and execution plans become suboptimal
• Statistics have to be updated• Possibly unpredictable changes of execution plans
• Today you have ‘freeze’ critical plans or statistics
Solution• Optimizer automatically manages SQL Plan Baselines
• Only known and verified plans are used
• Plan changes are automatically verified in maintenance window• Only comparable or better plans are used going forward
• Can pre-seed critical SQL with baselines from SQL Replay
Automatic Diagnostic Repository
Automatic Diagnostic WorkflowReduce Time to Problem Resolution
Duplicate Bug?
Yes
EM Support Workbench: Apply Patch or Workaround Guided Repair
No
EM Support Workbench: Package Incident information
including CCR info Guided Repair
Incident Packaging Service First-failure Capture
Critical
Error
Alert DBA Targeted assessments Assisted SR Filing
Auto Bug Matching (post 11gR1)
1 2 3
45
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New Change Assurance Capabilities in Oracle Database 11g
Capture &Replay
Workload
Set Up TestEnvironments
PerformOnline
Application Upgrades
Detect &Tune
PerformanceChanges
ManageExecution
PlanEvolution
PackageIncidents
forSupport
OnlineHot
Patching
29
Incident Packaging Service
30
New Change Assurance Capabilities in Oracle Database 11g
Capture &Replay
Workload
Set Up TestEnvironments
PerformOnline
Application Upgrades
Detect &Tune
PerformanceChanges
ManageExecution
PlanEvolution
PackageIncidents
forSupport
OnlineHot
Patching
31
Feature-Based Patching
Automatic correlation against feature usages eliminates unnecessary downtime
Both ad-hoc searches and subscription supported
Yes
Proactively push metadata (version, feature relevance) for evaluation
Download patch
Customer Relevant
Patch Found?
Recommended interim patch becomes
available in Metalink
Database targets/groups
Features & versions collected
Apply patch
1 2
3
4
5
Grid/DB Control
32
EM-driven Proactive Patching
33
Database feature based Patching
34
Online Patching of One-off Patches
• Patch a running Oracle instance with no downtime• Many one-off patches can be online patched
• Subset of RAC online upgradeable patches• Great for diagnostic patches
• Enable, disable and de-install one-off patches with no downtime• Integrated with OPatch and inventory
• Initially available on Linux and Solaris• Long term goal is online patching of Critical
Patch Updates (CPUs).
35
Online Patch Upgrade using RAC
Initial RAC Configuration Clients on A, Patch B
EmergencyOne-offPatches
OperatingSystemUpgrades
Upgrade Complete
HardwareUpgrades
Clients Clients
Clients on B, Patch A
Patch
1 2
34
A
B PatchB
Critical Patch Updates
36
Online Database Upgrades using SQL Apply
Major ReleaseUpgrades
Patch SetUpgrades
Cluster Software & Hardware Upgrades
Initial SQL Apply Config
ClientsRedo
Version X Version X
1
BA
Switchover to B, upgrade A
Redo
4
Upgrade
X+1X+1
BA
Run in mixed mode to test
Redo
3
X+1X
A B
Upgrade node B to X+1
Upgrade
LogsQueue
X
2
X+1
A B
38
Automatic SQL Tuning
• Automatically chooses high-load SQL based on response time, throughput and frequency criteria
• Automatically tunes SQL by creating SQL Profiles
• Automatically test executes the tuned plans to verify improvement
• Automatically implements greatly (3X) improved plans (optional)
• Automatically reports missing access structures, stale stats, poorly structured SQL
• Automatically runs during maintenance window or manually triggered
Well-tuned SQL
PackagedApps
Customizable Apps
Advisor Report
Automatic SQL Tuning
Index, Stats,
Structure Analysis
Test Execute
SQL Profiles
Implement
Automatic
High-Load SQL
AWR
Nightly
SQL Profiling
Manual
39
Index, MV Analysis
Partition Management Made Easy
Partition Advice from Access Advisor• Provide advice on Partitioning methods • Partitioning advice for tables,indexes, MVs• Consider entire query & DML workload to
improve query performance• Integrated, non-conflicting advice with Indexes,
MVs
Automatic Interval Partition Creation • On first insert• With constant width intervals for dates and
numbers• Existing RANGE partitioned tables can be
converted to INTERVAL• RANGE and INTERVAL can coexist in a single
tableWell-Designed Schema
SQL Workload
PackagedApps
Customizable Apps
Access Advisor
Index, MV Advice
PartitionAnalysis
Partition Advice
40
Flashback Data Archive
• Long term retention - years• Automatically stores all
changes to selected tables in Flashback Data Archive• Archive cannot be modified• Old data purged per retention
policy• View table contents as of any
time using Flashback SQL• Uses
• Change Tracking• ILM• Long term history• Auditing• Compliance
ORDERS
User Tablespaces
Flashback Data Archive
ArchiveTables
Oracle Database
Changes
Total Recall
Select * from orders AS OF ‘Midnight 31-Dec-2004’
41
Physical Standby with Real-Time Query
Physical Standby Database
Primary Database
Real-time Queries
Continuous Redo Shipment and Apply
Concurrent Real-Time
Query
• Read-only queries on physical standby concurrent with redo apply• Supports RAC on primary / standby• Queries see transactionally consistent results
• Immediate appeal to the many users of physical standby
• DR with real time query is unique in the industry – no idle resources
• Handles all data types, but not as flexible as logical standby
43
PerformanceMajor New Performance Innovations
• Automatic “native” PL/SQL and Java compilation• Now fully transparent, no C compiler required
• SecureFiles• New generation LOBs just as fast as files
• Query Results caches • Fast caching of query/function results for read-mostly data
• Table Compression• Now for OLTP as well as DW applications
• And much more …• RAC optimizations, TimesTen enhancements, faster
triggers, Auto NFS, faster upgrades, faster Streams, faster Data Guard, …
44
Oracle SecureFilesUnified Storage
• SecureFiles is a new database feature designed to break the performance barrier keeping file data out of databases
• Similar to LOBs but much faster, and with more capabilities• Transparent encryption, compression, deduplication, etc.
• Preserves the security, reliability, and scalability of database
• Superset of LOB interfaces allows easy migration from LOBs
• Enables consolidation of file data with associated relational data• Single security model
• Single view of data
• Single management of data
45
Server Results Cachetaking the buffer cache to the next level
join
join
T1 GBY
join
T2 T3
GBY
join
T4 join
T5 T6
join
join
T1 GBY
join
T2 T3
GBY
join
T4 join
T5 T6
Q1: build query cachejoin
join
T1 GBY
join
T2 T3
GBYQ2: Use it transparently
cache
• Automatically Caches results of queries, query blocks, or pl/sql function calls
• Cache is shared across statements and sessions on server
• Significant speed up for read-only / read-mostly data
46
OCI Consistent Client Cachelike cache fusion between server and client
• Caches query results on client• Improves performance for read-mostly tables
• Faster response time - eliminates network round trips• Saves server CPU
• Consistent with server• Cache proactively refreshed when result set changes• Maximum age of consistency info can be set
Application Server
Database
Consistent Caching
49
Information Management
• Complete• Integrated• Robust• Scalable• Secure• Available on all platforms
Oracle interMediaDICOM Medical Image support
Oracle Locator & SpatialImproved maps, 3D support, traffic updates
XML DBBinary XML, Schema Evolution
Information RetrievalInformation RetrievalText Improvements, Semantic Processing
RelationalSecure Files
Oracle Content and Records DB11g Feature Refresh
50
Addt’l Oracle Database 11g Highlights• High Availability
• Logminer, Physical Standby, Streams support for XMLType, TDE
• Fast Start Failover with Async Propagation• Faster Logical Standby Apply• Flashback Transaction• Data Repair Advisor
• Integration• Faster Gateways• Gateways to Legacy Databases• Streams Synchronous Capture• Streams Faster Apply
• Performance and Scalability• RAC Scalability Enhancements• Faster PL/SQL Triggers
• Security• Tablespace and LOB Encryption• Secure By Default• Enterprise Manager support for TDE, OLS, VPD, EUS• TDE works with LOBS, log miner
• Windows• VSS Writer for Point In Time Copies
• Manageability and Diagnosability• Unified Automatic Memory Management• Scheduler supports remote jobs• Automatic Health Monitoring• Faster Database Upgrades
• ASM• Variable extent sizes, Fast resync, Preferred reads
• RAC• Highly optimized protocols• ADDM for RAC
• Content Management Infrastructure• Binary XML storage• Enhanced XML indexing• Combined Text and Relational Indexes• DICOM Medical Imaging Support• Storage & Query of Semantic Content (RDF, OWL)
• Business Intelligence• Next generation OLAP• Supermodels for Data Mining• Enterprise Manager is DW aware• PIVOT/UNPIVOT operators
AQ&Q U E S T I O N SQ U E S T I O N S
A N S W E R SA N S W E R S
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