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Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server processes
- Memory structures (SGA, PGA)
- Parsing and shared cursors
- Data files, log files, and parameter files
Execution Plan Analysis
- Hypothetical plans (EXPLAIN PLAN, SQL*Plus AutoTrace)
- Actual execution plans (V$SQL_PLAN, TKPROF, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring current instance status via data dictionary views
- Monitoring historical data
- Application tracing (SQL*Trace, TKPROF, TRACESESS)
Optimization Processes
- Characteristics of cost-based optimization and its controls
- Determining optimization strategies
Managing Cost-Based Optimization
- Session and instance parameters
- Hints
- Query plan patterns
Statistics and Histograms
- Impact of statistics and histograms on performance
- Methods for collecting statistics and histograms
- Strategies for collecting and estimating statistics
- Statistics management: blocking, copying, editing, collection automation, and monitoring changes
- Dynamic sampling (temporary tables, complex predicates)
- Multi-column and expression-based statistics
- System statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extents
- Blocks
Data Storage Methods
- Physical aspects of tables
- Temporary tables
- Index-organized tables
- External tables
- Partitioned tables (range, list, hash, composite)
- Physical table reorganization
Materialized Views and Query Rewrite Mechanisms
Data Indexing Methods
- Creating B-TREE indexes
- Index properties
- Index types: unique, composite, function-based, reverse
- Compressed indexes
- Index rebuild and coalescing
- Virtual indexes
- Clustered and non-clustered indexes
- Bitmap indexes and joins
Case Study: Full Table Scans
- Impact of block size and storage on table-level performance
- Conventional and direct-path data loading
- Predicate ordering
Case Study: Index-Based Data Access
- Index access methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Utilizing function-based indexes
- Index selectivity (Clustering Factor)
- Composite indexes and SKIP SCAN
- NULL values and indexes
- Index-organized tables (IOT)
- Impact of indexes on DML operations
Case Study: Sorting
- Sort memory usage
- Index sorting
- Linguistic sorting
- Effect of data distribution on sorting (Clustering Factor)
Case Study: Joins and Subqueries
- Join methods: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Join order determination
- Outer Joins
- Anti-Joins
- Semi-Joins
- Simple subqueries
- Correlated subqueries
- Views and WITH clauses
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST ITERATOR
- VIEW
- FILTER
- COUNT STOPKEY
- Result Cache
Distributed Queries
- Reading query plans involving dblink usage
- Selecting the driving table
Parallel Processing
Requirements
- Proficiency in SQL fundamentals and knowledge of the Oracle database environment (preferably after completing 'Native SQL for Programmers - Workshops' training)
- Practical experience working with Oracle
28 Hours
Testimonials (2)
1. I liked the trainer's style of presenting and the patience to explain. 2. I liked that the trainer answered our side questions, even the ones that took the discussion a bit farther from the presentation, which showed flexibility. 3. I liked that there was a practical lab, not just a theoretical part. 4. I liked that it was online.
Roxana - DB Global Technology
Course - Oracle 11g - Application Tuning - Workshop
Trainer expertise on SQL tuning
