How To Fix RT150 - CCMS self-monitoring: number of free active alert slots in shared memory

RT150 - Overview

• Message type: E = Error

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

• Message number: 150

• Message text: CCMS self-monitoring: number of free active alert slots in shared memory

What causes this issue?

The <LS>Space </> subtree contains attributes for the remaining space
in the shared memory monitoring segment. Among other things, alerts are
stored in this segment, until they are completed and saved in the alert
database.
This monitoring tree element specifies the percentage of the monitoring
segment that is still available for alerts.
See also SAP Note 414029.

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

INCLUDE SELFMON_INSTANZ OBJECT DOKU ID TX

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

RT150 - Details

• The SAP error message RT150, which pertains to CCMS (Computing Center Management System) self-monitoring, indicates that the number of free active alert slots in shared memory has reached a critical level. This can affect the monitoring capabilities of the system, as it may not be able to register new alerts or monitor certain parameters effectively.
  
  Cause:
  The primary cause of this error is that the number of active alert slots configured in the system has been exhausted. This can happen due to:
  
  High Volume of Alerts: If there are too many alerts being generated, the available slots can fill up quickly.
  
  Configuration Issues: The system may be configured with a low number of alert slots, which may not be sufficient for the current monitoring needs.
  Memory Leaks: In some cases, memory leaks or other performance issues can lead to the depletion of available slots.
  Long-Running Alerts: Alerts that take a long time to resolve or clear