3798720 - SDMI online migration: how to calculate Max. Parallel Processes for R_SDM_ONLINE_EXEC

• How to calculate a safe value for the "Max. no. of parallel threads" parameter in report  R_SDM_ONLINE_EXEC.

• How to calculate a safe value for the "Max. Parallel Processes of a migration" parameter in SDM_MON → Config Options for online SDMI execution.

• SAP Note 2916801 describes the parameter but does not provide a calculation method.

• The question arises in the context of S/4HANA upgrade planning when preparing to increase the default value of 4.

• After increasing the parallel process count, the migration fails with one of the following errors in the SUM log files:

  CLSDM<class>: not started due to resource bottleneck
  CLSDM<class>: not started after 3 attempts due to resource bottleneck

• Business users experience application freezes or database locks after the parallel process count is increased.

• SAP S/4HANA on-premise
• SAP S/4HANA Private Cloud (ECS)
• SAP_BASIS 754 and higher
• S4CORE 104 or higher

SDMI, Silent Data Migration, parallel processes, Max Parallel Processes, R_SDM_ONLINE_EXEC, SDM_MON, Max no of parallel threads, DIA work processes, resource bottleneck, SUM-Phase Max Load Percent, partitioning, ST04, S/4HANA upgrade, BC-CCM-SDM, configuration options, SDM configuration , KBA , BC-CCM-SDM , Silent Data Migration for SAP S/4HANA , Problem