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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
- Theoretical plans (EXPLAIN PLAN, SQLPlus AutoTrac XPlane)
- Actual execution plans (V$SQL_PLAN, XPlane, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring current instance status via system dictionary views
- Analyzing historical dictionary data
- Application tracking (SQLTrace, TkProf, TreSess)
Optimization Processes
- Cost-based optimization properties and regulations
- Determining optimization strategies
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, automating 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
- Extensions (EXTENTS)
- Blocks
Data Storage Methods
- Physical table aspects
- Temporary tables
- Index-organized tables
- External tables
- Table partitioning (range, list, hash, mixed)
- Physical table reorganization
Materialized Views and the QUERY REWRITE Mechanism
Data Indexing Methods
- Building B-TREE indexes
- Index properties
- Index types: unique, multi-column, function-based, and reverse
- Index compression
- Index rebuilding and merging
- Virtual indexes
- Private and public indexes
- Bitmap indexes and joins
Case Study - Full Table Scans
- The impact of table and block placement on read performance
- Conventional vs. direct path data loading
- Predicate ordering
Case Study - Data Access via Index
- 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 NULLs in indexes
- Index-Organized Tables (IOT)
- The impact of DML operations on indexes
Case Study - Sorting
- Memory-based sorting
- Index sorting
- Linguistic sorting
- The effect of entropy on sorting (Clustering Factor)
Case Study - Joins and Subqueries
- Join methods: MERGE, HASH, NESTED LOOP
- Joins in OLTP and OLAP systems
- Order of operations
- Outer Joins
- Anti-Joins
- 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 leading table
Parallel Processing
Requirements
- Proficiency in basic SQL and a solid understanding of the Oracle database environment (completion of the 'Native SQL for Programmers - Workshops' training on Oracle 11g is preferred)
- Hands-on 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
