Oracle Pcp

Parallel Concurrent Processing
Mike Swing TruTek [e-mail] RMOUG 2009
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Conclusions
• You don’t need RAC to use Parallel Concurrent Processing (PCP)! • If you have PCP enabled, secondary nodes must be defined during the upgrade to R12 • Tuning of TCP, SQLNet and PMON parameters can minimize PCP failover time. • Implement Failover Sensitive Workshifts

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Concurrent Processing Server
Allows scheduling of jobs – batch jobs, or Requests in Oracle terms. Processes concurrent programs as a Request. Requests can be grouped together into Request Sets. Different types of concurrent managers handle different types of requests. A concurrent program can be assigned to a responsibility, and that responsibility can be assigned to users, allowing them the permission to run the concurrent program. Concurrent managers may have limits on the concurrent programs that can be run, and the times that they can be started. Requests have priorities, status and log and out files in the above directory
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Definitions
• • • • • • • CP => Concurrent Processing DCD => Dead Connection Detection ICM => Internal Concurrent Manager IM => Internal Monitor CRM => Conflict Resolution Manager PCP => Parallel Concurrent Processing PMON => Process Monitor for ICM
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Concurrent Request

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Phase and Status of Concurrent Requests
Phase Pending Pending Running Completed Completed Completed Inactive Status Normal Standby Normal Normal Error Warning No Manager Description - Action The request is waiting to be picked up by the next available manager. Waiting for CRM to resolve conflict. CRM could be slow or an incompatible program is running. The request is running normally. The request has finished successfully The request has finished with an error. Check logs. The request has finished with a Warning. Check the logs. Request won’t run without a manager. Specialization rules aren’t configured properly.
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PCP Failover
•DB Node – RH8
•Database

•RH7

•RH8

•RH9

References: • • • • • • • • • • • • 249213.1 - Performance problems with Failover when TCP Network goes down 364171.1- TAF Session Hangs, Select Fails To Complete W/ Loss Of NIC: Tune TCP Keepalive 211362.1 - Process Monitor Session Cycle Repeats Too Frequently 291201.1 - How To Remove a Dead Connection to the Target Database 362135.1 - Configuring Oracle Applications Release 11i with Oracle10g Release 2 Real Application Clusters and Automatic Storage Management Optimizing the E-Business Suite with Real Application Clusters (RAC) - Ahmed Alomari 240818.1 - Concurrent Processing: Transaction Manager Setup and Configuration Requirement in an 11i RAC Environment R12 ATG - Concurrent Processing Functional Overview – Aaron Weisberg 210062.1 - Generic Service Management (GSM) in Oracle Applications 11i 271090.1 - Parallel Concurrent Processing Failover/Failback Expectations 241370.1 - Concurrent Manager Setup and Configuration Requirements in an 11i RAC Environment 602899.1 - Some More Facts On How to Activate Parallel Concurrent Processing 126