Db2 12 for z/OS SQL Performance and Tuning
- Code training CV964G
- Duur 3 dagen
- Taal Engels
Andere trainingsmethoden
Methode
Deze training is in de volgende formats beschikbaar:
-
Klassikale training
Klassikaal leren
-
Virtueel leren
Virtueel leren
Vraag deze training aan in een andere lesvorm.
Trainingsbeschrijving
Naar bovenThis course is designed to teach the students how to prevent SQL performance problems and how to improve the performance of existing SQL.
Virtueel en Klassikaal™
Virtueel en Klassikaal™ is een eenvoudig leerconcept en biedt een flexibele oplossing voor het volgen van een klassikale training. Met Virtueel en Klassikaal™ kunt u zelf beslissen of u een klassikale training virtueel (vanuit huis of kantoor )of fysiek op locatie wilt volgen. De keuze is aan u! Cursisten die virtueel deelnemen aan de training ontvangen voor aanvang van de training alle benodigde informatie om de training te kunnen volgen.
Data
Naar bovenDoelgroep
Naar bovenThis course is for Db2 12 for z/OS application developers, Db2 12 for z/OS DBAs, and anyone else with a responsibility for SQL performance and tuning in a Db2 12 for z/OS environment.
Trainingsdoelstellingen
Naar bovenAfter completing this course, students will be able to:
- Understand and design better indexes
- Determine how to work with the optimizer (avoid pitfalls, provide guidence)
- Optimize multi-table access
- Work with subqueries
- Avoid locking problems
- Use accounting traces and other tools to locate performance problems in existing SQL and more
Inhoud training
Naar boven- Introduction to SQL performance and tuning
- Performance issues
- Simple example
- Visualizing the problem
- Summary Performance analysis tools
- Components of response time
- Time estimates with VQUBE3
- SQL EXPLAIN
- The accounting trace
- The bubble chart
- Performance thresholds Index basics
- Indexes
- Index structure
- Estimating index I/Os
- Clustering index
- Index page splits Access paths
- Classification
- Matching versus Screening
- Variations
- Hash access
- Prefetch
- Caveat More on indexes
- Include index
- Index on expression
- Random index
- Partitioned and partitioning, NPSI and DPSI
- Page range screening
- Features and limitations Tuning methodology and index cost
- Methodology
- Index cost: Disk space
- Index cost: Maintenance
- Utilities and indexes
- Modifying and creating indexes
- Avoiding sorts Index design
- Approach
- Designing indexes Advanced access paths
- Prefetch
- List prefetch
- Multiple index access
- Runtime adaptive index Multiple table access
- Join methods
- Join types
- Designing indexes for joins
- Predicting table order Subqueries
- Correlated subqueries
- Non-correlated subqueries
- ORDER BY and FETCH FIRST with subqueries
- Global query optimization
- Virtual tables
- Explain for subqueries Set operations (optional)
- UNION, EXCEPT, and INTERSECT
- Rules
- More about the set operators
- UNION ALL performance improvements Table design (optional)
- Number of tables
- Clustering sequence Denormalization
- Materialized query tables (MQTs)
- Temporal tables
- Archive enabled tables Working with the optimizer
- Indexable versus non-indexable predicates
- Boolean versus non-Boolean predicates
- Stage 1 versus stage 2
- Filter factors
- Helping the optimizer
- Pagination Locking issues
- The ACID test
- Reasons for serialization
- Serialization mechanisms
- Transaction locking
- Lock promotion, escalation, and avoidance More locking issues (optional)
- Skip locked data
- Currently committed data
- Optimistic locking
- Hot spots
- Application design
- Analyzing lock waits Massive batch (optional)
- Batch performance issues
- Buffer pool operations
- Improving performance
- Benefit analysis
- Massive deletes
Voorkennis
Naar boven- Familiarity with SQL
- Familiarity with Db2 12 for z/OS
- Familiarity with Db2 12 for z/OS application programming
- #000000
- CV964G
- Db2 12 for z/OS SQL Performance and Tuning
- Business Analysis
- CV964G | Db2 12 for z/OS SQL Performance and Tuning | Training Course | IBM.
- IBM