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Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server processes
- Memory structures (SGA, PGA)
- Query parsing and shared cursors
- Data files, log files, and parameter files
Analysis of Command Execution Plans
- Theoretical plans (EXPLAIN PLAN, SQLPlus AutoTrac, XPlane)
- Actual execution plans (V$SQL_PLAN, XPlane, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring current instance status via system dictionary views
- Analyzing historical dictionary data
- Application tracing tools (SQLTrace, TkProf, TreSess)
Optimization Processes
- Cost-based and rule-based optimization properties
- Determining optimal strategies
Controlling the Cost-Based Optimizer
- Session and instance parameters
- Using hints
- Query plan patterns
Statistics and Histograms
- The impact of statistics and histograms on performance
- Methods for collecting statistics and histograms
- Strategies for statistics counting and estimation
- Statistical management: blocking, copying, editing, automated collection, and change monitoring
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column and expression-based statistics
- System-level statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extent (EXTENTS) management
- Block structure
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 Strategies
- Constructing B-TREE indexes
- Index properties and characteristics
- Types of indexes: unique, multi-column, function-based, inverted
- Index compression
- Index rebuilding and merging
- Virtual indexes
- Private vs. public synonyms for indexes
- Bitmap indexes and bitmapped join indexes
Case Study: Full Table Scans
- Impact of table placement and block size on read performance
- Conventional vs. direct path data loading
- Order of predicates in queries
Case Study: Index-Based Data Access
- Index access methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Utilizing functional indexes
- Index selectivity (Clustering Factor)
- Multi-column indexes and SKIP SCAN
- Handling NULL values in indexes
- Index-Organized Tables (IOT)
- Impact of DML operations on indexes
Case Study: Sorting Operations
- In-memory sorting
- Sort indexes
- Linguistic sorting
- Effect of data entropy and Clustering Factor on sorting
Case Study: Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Joins in OLTP vs. OLAP systems
- Join order optimization
- Outer Joins
- Anti-joins
- Semi-joins
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST ITERATOR
- VIEW operations
- FILTER operations
- COUNT STOPKEY
- Result Cache
Distributed Queries
- Query plan analysis for DBLink usage
- Selecting leading tables
Parallel Processing
Requirements
- Proficiency in basic SQL and a solid understanding of the Oracle database environment (completion of the "Native SQL for Programmers" workshop is recommended)
- Practical hands-on experience working with Oracle databases
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
