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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
Execution Plan Analysis
- Predicted plans (EXPLAIN PLAN, SQL*Plus Autotrace/XPlan)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring instance status via data dictionary views
- Reviewing historical data dictionaries
- Tracing applications (SQL Trace, TkProf, TreSess)
Optimization Process
- Characteristics of the cost-based optimizer and regulation
- Optimization modes
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 collecting and estimating statistics
- Statistics management: blocking, copying, editing, automation of collection, and monitoring changes
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column statistics and expression-based statistics
- 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 table reorganization
Materialized Views and Query Rewrite Mechanism
Data Indexing Methods
- Creating B-TREE indexes
- Index characteristics
- Index types: unique, composite, function-based, domain, inverse
- Compressed indexes
- Index reconstruction and coalescing
- Virtual indexes
- Private and public indexes
- Bitmap indexes and joining
Case Study: Full Data Scans
- Impact of tablespace placement and block performance on reads
- Conventional and direct-path data loading
- Predicate order
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)
- Composite indexes and SKIP SCAN
- NULL values and indexes
- Index-Organized Tables (IOT)
- Impact of indexes on DML operations
Case Study: Sorting Operations
- Sorting in memory
- Index sorting
- Linguistic sorting
- Impact of entropy on sorting (Clustering Factor)
Case Study: Joins and Subqueries
- Join types: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Join order
- Outer Joins
- Anti-join
- 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 query plans involving DB links
- Selecting the driving instance
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
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
