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Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server processes
- Memory structures (SGA, PGA)
- Cursor parsing and shared cursors
- Data files, log files, and parameter files
Analyzing Execution Plans
- Hypothetical plans (EXPLAIN PLAN, SQLPlus AutoTrace)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Monitoring Performance and Identifying Bottlenecks
- Monitoring instance status via system dictionary views
- Historical dictionary monitoring
- Application tracking (SQLTrace, TkProf, Tracesess)
The Optimization Process
- Cost optimization parameters and controls
- Optimizer directives
Controlling the Cost-Based Optimizer:
- Session and instance parameters
- Hints
- Query plan outlines
Statistics and Histograms
- Impact of statistics and histograms on performance
- Methods for collecting statistics and histograms
- Statistics collection strategies and estimation techniques
- Statistics management: blocking, copying, editing, automating collection, and monitoring changes
- Dynamic sampling (temporary tables, complex predicates)
- Multicolumn statistics based on expressions
- 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 reorganization of tables
Materialized Views and Query Rewrite Mechanisms
Data Indexing Methods
- Building B-TREE indexes
- Index properties
- Index types: unique, multicolumn, function-based, reverse
- Index compression
- Rebuilding and coalescing indexes
- Virtual indexes
- Local and global indexes
- Bitmap indexes and join indexes
Case Study: Full Table Scans
- Impact of table and block placement on read performance
- Conventional and direct-path data loading
- Predicate order
Case Study: Index-Based Data Access
- Index access methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Using function-based indexes
- Index selectivity (Clustering Factor)
- Multicolumn indexes and skip scans
- NULL values and indexes
- Index-organized tables (IOT)
- Impact of indexes on DML operations
Case Study: Sorting Operations
- Memory-based sorting
- Index-based sorting
- Linguistic sorting
- Impact of entropy on sorting (Clustering Factor)
Case Study: Joins and Subqueries
- Join methods: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Join order
- Outer Joins
- Anti-joins
- Semi-joins
- 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
- Reading execution plans for queries using database links
- Choosing the driving table
Parallel Processing
Requirements
- Fundamental knowledge of SQL and familiarity with the Oracle database environment (ideally having completed the 'Native SQL for Programmers' 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
