How To Fix RT865 - Physical CPU Idle

RT865 - Overview

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 865

• Message text: Physical CPU Idle

What causes this issue?

Denotes the current number of physical CPU's which are idle in the share
pool to which this LPAR is assigned.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT865 - Physical CPU Idle ?

  The SAP error message RT865 "Physical CPU Idle" typically indicates that the physical CPU is not being utilized effectively, which can lead to performance issues in the SAP system. This message is often related to the configuration of the SAP system, the underlying hardware, or the workload being processed.
  Causes:
  
  Underutilization of Resources: The CPU may be underutilized due to insufficient workload or inefficient processing of tasks.
  
  Configuration Issues: Incorrect configuration of the SAP system or the underlying operating system can lead to poor CPU utilization.
  Inefficient Queries: Long-running or inefficient queries can cause the CPU to remain idle while waiting for I/O operations to complete.
  System Bottlenecks: Other system resources (like memory or disk I/O) may be bottlenecking the CPU, causing it to remain idle.
  Load Balancing Issues: If the workload is not evenly distributed across available CPUs, some CPUs may remain idle while others are overutilized.
  
  Solutions:
  
  Analyze Workload: Use transaction codes like ST03N (Workload Analysis)