Download Automatic Database Configuration for DB2 Universal

DB2 Universal Database
Automatic Database Configuration
for DB2 Universal Database
Compressing Years of Performance
Expertise into Seconds of Execution
Eva Kwan, Berni Schiefer, Sam Lightstone, Adam Storm and
Leanne Wu -- IBM Toronto Lab
February 27, 2003 | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Agenda
 Autonomic Computing at IBM
 The DB2 Configuration Advisor
 How the Configuration Advisor works
 Demo
 Performance Results
 Summary
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Table of contents
Autonomic Computing at IBM
The DB2 Configuration Advisor
Demo
Performance Results
Summary
3
Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Autonomic Computing at IBM
 Computing systems are becoming larger and more complex
Performance remains critical
System management becomes more costly and time consuming
Database management software has become middleware
 Systems should be able to manage themselves
Self-Configuring
Self-Healing
Self-Optimizing
Self-Protecting
 Work being done across IBM on Autonomic Computing
www.ibm.com/autonomic
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Autonomic Computing in DB2
 Heath Center
Automatically diagnoses and fixes many common problems
Locking, logging, heap utilization
 Design Advisor
Suggests indexes based on workload characteristics
 Query Patroller
Automatically schedules queries based on users specifications
http://www.idug.org/member/journal/summer00/articl08.cfm
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Table of contents
Autonomic Computing at IBM
The DB2 Configuration Advisor
Demo
Performance Results
Summary
6
Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
DB2 Configuration Advisor
 Sets up to 37 of the most important performance critical
configuration parameters including those affecting:
Memory usage
Parallelism
Asynchronous I/O
Logging
 Three interfaces
Graphical User Interface integrated into the DB2 Control Center
Command Line Interface accessible through the DB2 CLP
Programmatically through C APIs or Java Stored Procedure
 Has existed since DB2 v5 but was significantly rewritten for v8.1 to
improve performance and versatility
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
How the Configuration Advisor Works
 Uses three sources of information to determine an appropriate
configurations
User input to 9 simple questions
Automatically sensed system characteristics
Expert heuristics
 Heuristics were devised through extensive consultation with many
database administrators and performance experts at IBM
 Extensive work done to ensure proper results regardless of the
workload and environment
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Table of contents
Autonomic Computing at IBM
The DB2 Configuration Advisor
Demo
Performance Results
Summary
9
Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Table of contents
Autonomic Computing at IBM
The DB2 Configuration Advisor
Demo
Performance Results
Summary
10
Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Experimental Results
 Four sets of experimental Results
 Two sets of experiments on OLTP type workloads
Tested both 32 and 64 bit code base
 Two sets of experiments on industrial workloads
Conducted at two of the world’s leading investment banks
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Precent of Hand-tuned
OLTP Tests
100
90
80
70
60
50
40
30
20
10
0
OLTP 32 Bit
OLTP 64 Bit
Workload
Hand Tuned
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Config. Advisor
Automatic Database Configuration for DB2 Universal Database | BTW 2003
Default
© 2003 IBM Corporation
DB2 Universal Database
Precent of Hand-tuned
Investment Banks
220
200
180
160
140
120
100
80
60
40
20
0
Bank A
Bank B
Workload
Hand Tuned
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Config. Advisor
Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation
DB2 Universal Database
Summary
 Configuration advisor dramatically reduces the cost of tuning
 Compared with expertly tuned databases Configuration Advisor
provides near hand-tuned performance
 Compared with industry tuned databases Configuration Advisor
shows substantial performance improvement
 Part of larger Autonomic Computing effort at IBM and within DB2
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Automatic Database Configuration for DB2 Universal Database | BTW 2003
© 2003 IBM Corporation