Error: S878 Datacom Server running out of memory

Products

• Datacom/AD

Issue/Introduction

Datacom Server address space fails to start or terminates unexpectedly with memory-related abends. This behavior occurs during initialization or under high concurrent load when resources are exhausted despite being out-of-box coded with REGION=0M.

Environment

• Datacom/AD
• Datacom/DB
• Datacom Server (All Releases)

Cause

Configuration mismatch where the DBUSERS parameter in the Datacom Server exceeds the TASKS parameter defined in the Multi-User Facility (MUF).

Resolution

Verify concurrent task configuration:

• 1. Check the MUF startup parameter TASKS.
  2. Ensure the Datacom Server parameter DBUSERS is set to a value equal to or lower than the MUF TASKS count.
  3. Example: If MUF TASKS is 250, set DBUSERS=10 or a similar lower value to prevent resource exhaustion.