Thank you for sending your enquiry! One of our team members will contact you shortly.
Thank you for sending your booking! One of our team members will contact you shortly.
Course Outline
Application Tuning Methodology
Database and Instance Architecture
- Server processes
- Memory architecture (SGA, PGA)
- Statement parsing and shared cursors
- Data files, log files, and parameter files
Execution Plan Analysis
- Theoretical plans (EXPLAIN PLAN, SQLPlus AutoTrace, XPlan)
- Actual execution plans (V$SQL_PLAN, XPlan, AWR)
Performance Monitoring and Bottleneck Identification
- Monitoring instance status via system dictionary views
- Analyzing historical dictionary data
- Application tracing (SQLTrace, TkProf, TreSess)
Optimization Processes
- Cost-based vs. rule-based optimization characteristics
- Methods for determining optimal execution paths
Controlling the Cost-Based Optimizer
- Session and instance parameters
- Optimization hints
- Query plan outlines
Statistics and Histograms
- The impact of statistics and histograms on query performance
- Methods for gathering statistics and histograms
- Strategies for counting and estimating statistics
- Managing statistics: locking, copying, editing, automating collection, and tracking changes
- Dynamic sampling (handling temporary tables and complex predicates)
- Multi-column and expression-based statistics
- System-level statistics
Logical and Physical Database Structure
- Tablespaces
- Segments
- Extensions (EXTENTS)
- Blocks
Data Storage Methods
- Physical characteristics of tables
- Temporary tables
- Indexed tables (IOTs)
- 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 and behaviors
- Types of indexes: unique, multi-column, function-based, reverse key
- Index compression
- Index rebuilding and coalescing
- Virtual indexes
- Local and global indexes
- Bitmap indexes and bitmap keys
Case Study - Full Table Scans
- Impact of table placement and block reads on performance
- Conventional vs. Direct Path data loading
- Effect of predicate ordering
Case Study - Index Access Paths
- Index scan methods (UNIQUE SCAN, RANGE SCAN, FULL SCAN, FAST FULL SCAN, MIN/MAX SCAN)
- Leveraging function-based indexes
- Index selectivity and Clustering Factor
- Multi-column indexes and SKIP SCAN
- Handling NULL values in indexes
- Index-Organized Tables (IOT)
- Impact of DML operations on indexes
Case Study - Sorting
- In-memory sorting
- Index-based sorting
- Linguistic sorting
- Effect of data clustering (Clustering Factor) on sorting performance
Case Study - Joins and Subqueries
- Join algorithms: MERGE, HASH, NESTED LOOP
- Join strategies in OLTP vs. OLAP systems
- Join order optimization
- Outer joins
- Anti-joins
- Semi-joins
- Simple subqueries
- Correlated subqueries
- Views and the WITH clause
Other Cost-Based Optimizer Operations
- Buffer sorts
- INLIST processing
- VIEW operations
- FILTER operations
- Count Stop Key
- Result Cache utilization
Distributed Queries
- Reading query plans involving DB Links
- Selecting the leading table in distributed queries
Parallel Processing
Requirements
- Proficient working knowledge of SQL fundamentals and the Oracle database environment (completion of 'Native SQL for Programmers' or similar Oracle 11g training is highly recommended)
- Hands-on practical experience working with Oracle databases
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
