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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
Command Execution Plan Analysis
- Hypothetical plans (EXPLAIN PLAN, SQL*Plus AutoTrace/XPlan)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring real-time instance status via system dictionary views
- Analyzing historical data through performance dictionaries
- Application tracking tools (SQL Trace, TkProf, TreSess)
Optimization Processes
- Cost-based optimization properties and regulations
- Methods for determining optimal execution paths
Controlling the Cost-Based Optimizer
- Session and instance-level parameters
- Optimizer 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: locking, copying, editing, automated collection, and change monitoring
- Dynamic data sampling (temporary tables, complex predicates)
- Expression-based multi-column statistics
- System-level statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extent extensions (EXTENTS)
- Data blocks
Data Storage Methods
- Physical table characteristics
- Temporary tables
- Indexed tables (IOTs)
- External tables
- Table partitioning (range, list, hash, composite)
- Physical table reorganization
Materialized Views and Query Rewrite Mechanisms
Data Indexing Techniques
- Constructing B-Tree indexes
- Index properties
- Index types: unique, multi-column, function-based, reverse-key
- Index compression
- Index rebuilding and merging
- Virtual indexes
- Private vs. public synonyms for indexes
- Bitmap indexes and bitmap joins
Case Study: Full Table Scans
- Impact of table and block-level placement on read performance
- Conventional vs. direct-path data loading
- Predicate ordering
Case Study: Index-Access Data Retrieval
- Index access methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Utilizing function-based indexes
- Index selectivity and Clustering Factor
- Multi-column indexes and SKIP SCAN
- Handling NULL values in indexes
- Index-Organized Tables (IOTs)
- Impact of DML operations on index maintenance
Case Study: Sorting Operations
- In-memory sorting
- Index-based sorting
- Linguistic sorting
- The effect of entropy and Clustering Factor on sorting performance
Case Study: Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Join strategies in OLTP and OLAP environments
- Join 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 ITERATION
- VIEW MERGE/EXPRESSION
- FILTER
- Count Stop Key
- Result Cache
Distributed Queries
- Reading query plans for DBLink usage
- Selecting leading tables in distributed operations
Parallel Processing
Requirements
- Confident command of SQL fundamentals and a solid understanding of the Oracle database environment (completion of foundational training such as 'Native SQL for Programmers' on Oracle 11g is recommended)
- Practical, hands-on experience with Oracle technologies
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
