How To Fix VIRT355 - CPU Bottleneck Indicator

VIRT355 - Overview

• Message type: E = Error

• Message class: VIRT - Virtualization Monitoring

• Message number: 355

• Message text: CPU Bottleneck Indicator

The CPU Bottleneck Indicator is only available for z/OS LPARs. It uses
the fact that RMF also reports Processor Delays and allows for a better
Analysis and Alerting. The semantic is agreed on by all SAP supported
virtualization platforms. The value range is 0-10. 0-5 is considered
o.k. ("green"), 6-7 mean "Warning"("Yellow") and 8-10 are "Red".
It is calculated according to the following table:
Delay,,,,log. CP Usage,,Bottleneck Indicator
0,,,,< 10 %,,,,0
0,,,,< 30 %,,,,1
0,,,,<50 %,,,,2
0,,,,<70 %,,,,3
0,,,,<90 %,,,,4
0,,,,90 % +,,,,5
1-2,,,,-,,,,,,6
3-4,,,,-,,,,,,7
5-6,,,,-,,,,,,8
7-8,,,,-,,,,,,9
10+,,,,-,,,,,,10,,,,,,,,,,

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VIRT355 - CPU Bottleneck Indicator ?

  The SAP error message VIRT355, which indicates a "CPU Bottleneck Indicator," typically arises when the system detects that the CPU resources are being overutilized, leading to performance degradation. This can occur in various scenarios, such as during peak processing times, inefficient coding, or inadequate hardware resources.
  
  Cause:
  
  High Workload: A sudden increase in transactions or background jobs can lead to CPU overload.
  Inefficient ABAP Code: Poorly optimized programs or queries can consume excessive CPU resources.
  
  Configuration Issues: Incorrect system configuration or parameters can lead to inefficient resource utilization.
  Insufficient Hardware: The existing CPU resources may not be adequate for the workload demands.
  Background Jobs: A large number of concurrent background jobs can lead to CPU contention.
  
  
  Solution:
  
  Analyze Workload: Use transaction codes like ST03N (Workload Analysis) or ST04 (Database Performance Analysis) to identify which processes are consuming the most CPU.
  Optimize ABAP Code: Review and optimize any custom ABAP programs or reports that are consuming excessive CPU time. Use