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Course Outline
Methodology for Application Tuning
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
- Theoretical plans (EXPLAIN PLAN, SQL*Plus AutoTrace, XPlan)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring current instance status using system dictionary views
- Analyzing historical dictionary data
- Application tracing (SQL Trace, Tkprof, TreSess)
Optimization Processes
- Cost-based and rule-based optimization properties
- Decision-making in optimization strategies
Controlling the Cost-Based Optimizer via:
- 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 calculating and estimating statistics
- Statistics management: locking, 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 characteristics of tables
- Temporary tables
- Index-organized tables
- External tables
- Table partitioning (range, list, hash, composite)
- Physical reorganization of tables
Materialized Views and Query Rewrite Mechanisms
Data Indexing Techniques
- Constructing B-Tree indexes
- Index properties
- Index types: unique, multi-column, function-based, descending
- Compressed indexes
- Index rebuilding and coalescing
- Virtual indexes
- Private and public synonyms for indexes
- Bitmap indexes and bitmap joins
Case Study: Full Table Scans
- The impact of table level and block placement on read performance
- Data loading via conventional and direct paths
- Predicate ordering
Case Study: Data Access via Indexes
- Index read methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Utilization of function-based indexes
- Index selectivity (Clustering Factor)
- Multi-column indexes and SKIP SCAN
- Handling NULLs in indexes
- Index-Organized Tables (IOT)
- Impact of indexes on DML operations
Case Study: Sorting Operations
- In-memory sorting
- Index-assisted sorting
- Linguistic sorting
- The effect of entropy on sorting (Clustering Factor)
Case Study: Joins and Subqueries
- Join types: MERGE, HASH, NESTED LOOP
- Join strategies in OLTP and OLAP systems
- Join order optimization
- Outer joins
- Anti-joins
- Anti-semi joins
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer Sort
- INLIST ITERATOR
- VIEW ACCESS
- FILTER OPERATIONS
- COUNT STOPKEY
- Result Cache
Distributed Queries
- Reading query plans involving database links
- Selecting leading tables
Parallel Processing
Requirements
- Proficient command of basic SQL and a solid understanding of the Oracle database environment (ideally, prior completion of the 'Native SQL for Programmers' workshop)
- 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
