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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
- Estimated execution plan (EXPLAIN PLAN, SQL*Plus Autotrace)
- Actual execution plan (V$SQL_PLAN, tkprof, AWR)
Monitoring Performance and Identifying Process Bottlenecks
- Monitoring the current status of the instance using system dictionary views
- Monitoring historical data dictionaries
- Tracking application performance (SQL Trace, TkProf, TKPROF)
Optimization Process
- Cost-based optimization properties and regulations
- Decision-making for optimization
Controlling the Cost-Based Optimizer via:
- 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 gathering and estimating statistics
- Statistics management: blocking, copying, editing, automation of collection, and monitoring changes
- Dynamic data sampling (temporary tables, complex predicates)
- Multi-column 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 the Query Rewrite Mechanism
Data Indexing Methods
- Building B-TREE indexes
- Index properties
- Index types: unique, composite, function-based, reverse
- Compressed indexes
- Rebuilding and merging indexes
- Virtual indexes
- Private and public indexes
- Bitmap indexes and bitmap join indexes
Case Study - Full Table Scans
- The impact of table and block placement on read performance
- Data loading via conventional and direct path methods
- Order of predicates
Case Study - Index Access Methods
- Index read methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Using function-based indexes
- Index selectivity (Clustering Factor)
- Composite indexes and skip scans
- NULL values and indexes
- Index-organized tables (IOT)
- Impact of indexes on DML operations
Case Study - Sorting
- Sort areas in memory
- Sort indexes
- Linguistic sorting
- The effect of entropy on sorting (Clustering Factor)
Case Study - Joins and Subqueries
- Join methods: MERGE JOIN, HASH JOIN, 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 ITERATOR
- VIEW
- FILTER
- STOPKEY Operation
- Result Cache
Distributed Queries
- Reading query plans for database links (dblinks)
- Choosing the driving site
Parallel Processing
Requirements
- Proficiency in the basics of SQL and knowledge of the Oracle database environment (preferably completion of the 'Native SQL for Programmers - Workshops' training for Oracle 11g)
- 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
