ORACLE PERFORMANCE TUNNING 1 – 1: Introduction to Oracle tuning - The top-down approach to tuning - The history of Oracle tuning - A review of the Oracle architecture - The goals of Oracle tuning - Overview of SQL tuning - Oracle network bottlenecks - Oracle RAM usage and bottlenecks - Oracle CPU usage and bottlenecks - Oracle disk I/O overview - Monitoring server (sat, vmstat, top, glance) - Movement toward server consolidation 1 – 2: Oracle disk I/O tuning - History of DASD - Understanding disk I/O - Monitoring disk I/O (AWR, dba_hist_filestatxs) - Sorted hash cluster tables - Disk I/O waits - Oracle data buffer internals (db_cache_size) - Caching data blocks in the PGA (parallel full-table scans) - Blocksize and I/O performance 1 – 3: Oracle CPU Tuning - Finding your cpu_count - Measuring CPU usage with vmstat - Oracle CPU usage - Using processor affinity - _optimizer_cost_model=cpu - Parallel query and CPU

1. ORACLE PERFORMANCE TUNNING
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ORACLE PERFORMANCE TUNNING
1 – 1: Introduction to Oracle tuning
- The top-down approach to tuning
- The history of Oracle tuning
- A review of the Oracle architecture
- The goals of Oracle tuning
- Overview of SQL tuning
- Oracle network bottlenecks

2. - Oracle RAM usage and bottlenecks
- Oracle CPU usage and bottlenecks
- Oracle disk I/O overview
- Monitoring server (sat, vmstat, top, glance)
- Movement toward server consolidation
1 – 2: Oracle disk I/O tuning
- History of DASD
- Understanding disk I/O
- Monitoring disk I/O (AWR, dba_hist_filestatxs)
- Sorted hash cluster tables
- Disk I/O waits
- Oracle data buffer internals (db_cache_size)
- Caching data blocks in the PGA (parallel full-table scans)
- Blocksize and I/O performance
1 – 3: Oracle CPU Tuning
- Finding your cpu_count
- Measuring CPU usage with vmstat
- Oracle CPU usage
- Using processor affinity
- _optimizer_cost_model=cpu
- Parallel query and CPU
1 – 4: Oracle RAM tuning
- all_rows and first_rows optimization and RAM
- Multiple data buffers
- Multiple blocksizes
- Measuring RAM paging
- Oracle SGA RAM
- Oracle PGA RAM
- Using the KEEP pool
- Automatic Memory Management (AMM)
1 – 5: Oracle Instance Tuning
- Global tuning techniques
- Display possible unnecessary large-table full-table scans
- Library cache tuning

3. - Finding missing indexes
- Tuning the database writer
- instance parameter tuning
1 – 6: Oracle SQL Tuning Introduction
- SQL tuning hierarchy
- SQL tuning goals
- optimizer modes
- query re-write
- cursor_sharing
- viewing execution plans (autotrace)
- verifying optimal join techniques
- parallelizing SQL execution
- dynamic statistics
- Exercise – count times when a table is invoked
- 12c new SQL features
- function-based virtual column
- adaptive execution plans
- 12c new optimizer metadata collection features
2 – 1: AWR and ASH
- AWR vs STATSPACK
- Reading an AWR report
- AWR report analyzer
- Basics of predictive modeling for performance
- Finding repeating signatures of data
2 - 2: Oracle RAC Tuning
- RAC architecture tuning
- Tuning disk I/O on RAC
- Tuning the cache fusion layer on RAC
2 – 3: Oracle Tuning Pack
- creating SQL Profiles
- Recommending new indexes
- “automatic” SQL Tuning
- SQL Performance Advisor (SPA)
- recommending object reorganization
2 – 5: Oracle Diagnostic pack

4. - AWR and ASH
- real time SQL monitoring
- comparing performance periods
- Oracle monitoring & alert notifications (setting thresholds)
2 – 6: Oracle Tracing
- 10046 tracing
- TKPROF tracing
- Trace analyzer
- Autotrace
3 – 1: Introduction to SQL tuning
- Pre-SQL database communications
- The evolution of SQL
- Declarative languages
3 –2: Optimizing Oracle SQL
- Parsing a SQL statement
- Semantic parsing
- Hard parse vs. soft parse
- Decision tree generation
- Making SQL reentrant
3 –3: Optimizer statistics
- Types of metadata
- Index metadata
- Segment metadata
- Server metadata
- System stats
3 – 4: Exposing & Reading Execution Plans
- autotrace
- SQL*Trace
- Determine the steps of an execution plan
3 – 5: altering execution plans

5. - Changing CBO statistics
- Changing init.ora SGA parameters
- Changing optimizer parameters
- Using hints
- Using the opt_param hint
3 – 6: Oracle indexing
- Overview of Oracle indexing
- bitmap indexes
- bitmap join indexes
- guidelines for creating indexes
- function-based indexes (FBI)
- index usage monitoring
- fishing in the library cache
- optimizing indexes
- The transient nature of indexing
- database modality of workloads
- SQL Workload analysis
- Identifying EOW, EOM and EOY SQL.
- Creating on-demand indexing
- oracle text indexes
DAY 4 Advanced Topics in Tuning
4 – 1: Boolean/Built-in functions
- Boolean evaluation
- Decode and case
- Basics of BIFs
- Function-based indexing
- Creating a custom BIF using PL/SQL
- The effect of BIFs on SQL execution
4 – 2: tuning Oracle sorting
- Basics of sorting
- RAM usage in a hash join
- RAM for indexes
- Use indexes to avoid sorts
- Sorts in execution plans
- Sorts in semi joins

6. - Use autotrace to see sorts
- What causes sorts?
- PGA and sorting
- super-sizing your PGA to avoid disk sorts
- sorted hash clusters
4 – 3: Tuning Oracle subqueries
- Subquery overhead
- Scalar subqueries
- In-Line views
- Correlated vs non-correlated subqueries
- WHERE clause query re-write
- Tuning IN and NOTIN subqueries
- Tuning EXISTS subqueries
- Tuning correlated subqueries
- Using subquery hints (push_subq)
- Avoiding subqueries
- Non-correlated subqueries and NOT IN clause
- Automatic rewrite of EXISTS subqueries
- The merge_aj hint
- The anti-join hints
4 – 4 Tuning with temp objects (materialized views, global temporary tables)
- Tuning with temporary tables
- Oracle global temporary tables (GTT)
- The Oracle SQL WITH clause
4- 5: Tuning full-table scans
- Basics of file multiblock I/O
- Deciding when to invoke full-table scan
- RAM caching in the SGA
- Automating table caching (KEEP Pool)
- Solid State Disks and full-table scans
- Using plan9i.sql to find full-table scans
- Tracking full-scans over time with AWR
4- 6 tuning parallel query

7. - Parallel query
- Parallel DML
- Parallel DDL
- Parallel utilities
- Setting optimal parallel degree
- RAC and parallel query
- Parallel query tuning and buffering
- Parallel query hints