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Parallel Processing in Oracle Database 12c (D87438)

Course Description Schedule Course Outline

Detailed Course Outline

Parallel execution concepts
  • Benefits of parallel processing
  • When to use parallel processing?
  • Query Coordinator and parallel execution (PX) servers
  • Parallel execution communication
  • The producer / consumer model
  • Execution plan basics
Using Manual DOP
  • Statements that can be parallelized
  • SELECT with single parallel table scan and the explain plan
  • SELECT with parallel hash join and the explain plan
  • Parallelized SELECT with partition wise join and the advantages
  • Parallelized DML operations
Using Auto DOP
  • Auto DOP versus manual DOP
  • Auto DOP parameters
  • Auto DOP behavior
  • Impact of Auto DOP on other parameters
  • SELECT explain plan with Auto DOP
  • Auto DOP in RAC environment
Using Statement Queuing
  • Comparing statement queuing to minimal DOP guarantee
  • Setting parameters
  • When to choose statement queuing
  • Using Database Resource Manager with statement queuing
  • Viewing queued statements
In-Memory Parallel Execution
  • The goal of In-Memory Parallel Execution
  • How SELECT works with and without in-memory parallel execution
  • Set parameters to use In-Memory parallel execution
  • In-memory PX examples
Parallel Execution and Data Loading
  • DataPump export / import
  • SQL*Loader
  • External tables: applying parallel execution as best practice
Troubleshoot situations when parallel processing does not proceed as desired
  • When parallel processing does not proceed as desired
  • When no parallel processing occurs
  • When Auto DOP computes unexpected DOP
  • When Statement Queuing starts unexpectedly
  • When performance decreases due to parallel execution
  • Tracing parallel execution
Managing a Mixed Workload with DBRM
  • Take advantage of DBRM to manage concurrent parallel executions with mixed workloads
  • Use plan directives to manage concurrent parallel executions
  • How to reject queries
  • Using dynamic switching
  • Understanding how directives interact
 

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