Understanding and Configuring PCP in Oracle EBS

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 1. What is PCP?

PCP stands for Parallel Concurrent Processing.

It allows Concurrent Managers in Oracle E-Business Suite to run on multiple nodes instead of just one.

Why use PCP?

  • Load Balancing – Distributes workload across multiple nodes for better performance.
  • High Availability – If one node fails, managers can failover to another node.
  • Failover and Failback – Automatically moves managers to available nodes during failure and back when the node is restored.

 

2. PCP Setup Types

  • RAC Database Setup – Commonly used with PCP.
  • Non-RAC Setup – PCP can still work without RAC by using TNS aliases for connectivity.

 

3. How PCP Works

  • Each node runs Concurrent Managers.
  • Managers connect to the database using TWO_TASK (TNS alias) defined in:
    • adcmctl.sh
    • gsmstart.sh

 

4. Internal Monitor (IMON)

  • Optional Service but recommended.
  • Monitors the Internal Concurrent Manager (ICM).
  • If the primary node fails:
    • IMON detects failure.
    • Starts ICM and other managers on another node.
  • Best Practice: Enable IMON on all nodes where ICM can start.

 

5. Internal Concurrent Manager (ICM)

  • Monitors other managers during PMON cycle.
  • Can run on any concurrent processing node.
  • Ensures managers are up and running.

 

6. Service Manager (FNDSM)

  • Required for PCP.
  • Manages services/managers on each node.
  • Started by APPS TNS Listener.
  • Listener spawns Service Manager when needed.
  • Stops when ICM stops.

Environment Setup:

  • Defined in gsmstart.sh and APPSORA.env.

 

7. Key Benefits of PCP

  • Better Performance: Workload distributed across nodes.
  • High Availability: Failover capability.
  • Scalability: Add more nodes easily.

Below is an example of how these parameters appear in the EBS context file:


-bash-4.2$ cat $CONTEXT_FILE |grep s_appldcp

                       <APPLDCP oa_var="s_appldcp">ON</APPLDCP>

-bash-4.2$ cat $CONTEXT_FILE |grep s_applcsf

                       <APPLCSF oa_var="s_applcsf">/u01/oracle/R122/DEV/fs_ne/DEV_<SERVER_NAME>/logs/appl/conc</APPLCSF>


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