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Duration 28 hours (4 days)
Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server processes
- Memory structure (SGA, PGA)
- Parsing and shared cursors
- Data files, log files, and parameter files
Command Execution Plan Analysis
- Estimated 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
- Reviewing historical dictionary data
- Application tracing (SQLTrace, TkProf, TreSess)
Optimization Processes
- Cost optimization properties and governance
- Determining optimization targets
Controlling the Cost-Based Optimizer
- 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 estimating and counting statistics
- Statistics management: blocking, copying, editing, automation, and change monitoring
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column statistics and expression-based statistics
- System statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extensions (EXTENTS)
- Blocks
Data Storage Techniques
- Physical table aspects
- Temporary tables
- Index-organized tables
- External tables
- Partitioned tables (range, list, hash, composite)
- Physical reorganization of tables
Materialized Views and Query Rewrite Mechanisms
Data Indexing Strategies
- Building B-TREE indexes
- Index properties
- Index types: unique, multi-column, function-based, reverse
- Compressed indexes
- Index rebuilding and coalescing
- Virtual indexes
- Private and public synonyms for indexes
- Bitmap indexes and bitmap joins
Case Study - Full Table Scans
- Impact of table and block placement on read performance
- Conventional vs. direct path data loading
- Predicate ordering
Case Study - Index-Based Data Access
- Index read 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
- In-memory sorting
- Index sorting
- Linguistic sorting
- Impact of entropy on sorting (Clustering Factor)
Case Study - Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Swap order optimization
- Outer Joins
- Anti-joins
- Incomplete joins (SEMI)
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST
- VIEW
- FILTER
- Count Stop Key
- Result Cache
Distributed Queries
- Query plans using dblink
- Selecting the leading table
Parallel Processing
Requirements
- The free use of the basics of SQL and knowledge of Oracle database environment (preferably Oracle 11g completion of training - Native SQL for Programmers - Workshops)
- Practical experience in working with Oracle
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
