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Duration 28 hours
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
Analysis of Command Execution Plans
- Hypothetical plans (EXPLAIN PLAN, SQLPlus AutoTrac XPlane)
- Actual execution plans (V$SQL_PLAN, XPlane, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring real-time instance status via system dictionary views
- Reviewing historical performance data
- Application tracing (SQLTrace, TkProf, TreSess)
Optimization Process
- Cost optimization properties and governance
- Determining optimization requirements
Controlling the Cost-Based Optimizer Through:
- Session and instance parameters
- Hints
- Query plan patterns
Statistics and Histograms
- The impact of statistics and histograms on performance
- Methods for collecting statistics and histograms
- Strategies for counting and estimating statistics
- Statistics management: blocking, copying, editing, automated collection, 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 Methods
- Physical table aspects
- Temporary tables
- Index-organized tables
- External tables
- Partitioned tables (range, list, hash, hybrid)
- Physical table reorganization
Materialized Views and QUERY REWRITE Mechanisms
Data Indexing Techniques
- Constructing B-Tree indexes
- Index characteristics
- Index types: unique, multi-column, functional, and reverse-key
- Index compression
- Index rebuilding and coalescing
- Virtual indexes
- Private and public synonyms for indexes
- Bitmap indexes and bitmap joins
Case Study – Full Data Scans
- The effect of table and block-level 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 indexes on DML operations
Case Study – Sorting
- In-memory sorting
- Index sorting
- Linguistic sorting
- The impact of entropy on sorting (Clustering Factor)
Case Study – Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP environments
- Switching order optimization
- Outer joins
- Anti-joins
- Semi-joins (incomplete joins)
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST ITERATOR
- VIEW operations
- FILTER operations
- Count Stop Key
- Result Cache
Distributed Queries
- Reading query plans involving DB Links
- Selecting leading tables
Parallel Processing
Requirements
- Proficiency in basic SQL concepts and a solid understanding of the Oracle database environment (completion of the 'Native SQL for Programmers' workshop on Oracle 11g is recommended)
- Hands-on practical experience working with Oracle databases
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
