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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 current instance status using system dictionary views
- Analyzing historical dictionary data
- Application tracking (SQLTrace, TkProf, TreSess)
Optimization Process
- Cost-based optimization properties and rules
- Methods for determining optimization strategies
Controlling the Cost-Based Optimizer
- Session and instance 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 sampling and estimating statistics
- Statistics management: blocking, copying, editing, collection automation, and change monitoring
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column and expression-based statistics
- System statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extensions (EXTENTS)
- Blocks
Data Storage Methods
- Physical aspects of tables
- Temporary tables
- Index-organized tables
- External tables
- Table partitioning (range, list, hash, composite)
- Physical table reorganization
Materialized Views and Query Rewrite
Data Indexing Methods
- Constructing B-TREE indexes
- Index properties
- Index types: unique, multi-column, function-based, and reverse-key
- Index compression
- Index rebuilding and merging
- Virtual indexes
- Private and public indexes
- Bitmap indexes and bitmap joins
Case Study - Full Table Scans
- The impact of table and block-level placement on read performance
- Conventional vs. direct-path data loading
- Predicate ordering
Case Study - Index 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
- Sorted indexes
- Linguistic sorting
- The effect of entropy on sorting (Clustering Factor)
Case Study - Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Join order optimization
- Outer Joins
- Anti-joins
- Inner 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
- Reading query plans involving dblinks
- Selecting the leading object
Parallel Processing
Requirements
- Proficiency in SQL fundamentals and familiarity with the Oracle database environment (preferably with prior completion of Oracle 11g training, such as 'Native SQL for Programmers - Workshops')
- 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
