SAP Release upgrade Configuration phase parameters
We are upgrading our BW environment from NW 7.0 to NW 7.4 using SUM tool with NZDT parameters active. We have finished with out test upgrade, now before proceeding with the next upgrades, need expert advice in selecting the right values in configuration phase, for the below 2 parameters.
1. Enter the maximum number of processes used
CRR Processes : < By default tool took value 3>
I don't find any supporting SAP notes on this topic, how this number matters & how good I can further tune this value.
2. Enter the maximum number of parallel phases to run:
PARALLEL PHASES (UPTIME )
PARALLEL PHASES (DOWNTIME)
Unable to understand the above, precisely which phase or session. How we can optimize this number.
Thanks & Regards
Reagan Benjamin replied
There is an explanation provided in the SUM guide for these parameters in the chapter Background Process and Tool Parameters.
3.10.4 Background Process and Tool Parameters
● BATCH PROCESSES (UPTIME) and BATCH PROCESSES (DOWNTIME)
Number of parallel background processes and activator processes used by tp. We recommend a value that is high enough to enable parallel processing, but small enough so that the production system is not affected.
● DDL PROCESSES (UPTIME) and DDL PROCESSES (DOWNTIME)
Number of parallel DDL processes used by tp to execute database statements
● R3TRANS PROCESSES (UPTIME) and R3TRANS PROCESSES (DOWNTIME)
Number of parallel import processes used by R3trans to import data into the database. Note that these processes can generate significant loads on the database.
● PARALLEL PHASES (UPTIME) and PARALLEL PHASES (UPTIME)
Number of parallel phases used by SAPup
● R3LOAD PROCESSES
Number of R3LOAD processes. When you enter the value 1, you have to calculate an import time of 6 hours for the EU_IMPORT phases. If the load on the database during the import is an issue, you can slow down the import of the substitution set to reduce its influence on the production system. To achieve this, enter a value lower than 1. The runtime is then extended to 6 hours multiplied by this factor. For example, the value 0.5 will slow down the import to last 12 hours.
The above information is taken from the SAP provide SUM guide.