Solution : https://service.sap.com/sap/support/notes/9942 (SAP Service marketplace login required)
Summary :
The maximum number of work processes for an instance in SAP varies by release and is influenced by factors such as available resources, OS limits, and display capabilities. Releases 4.6D and beyond support more than 100 processes; however, practical constraints often limit this to 100. Essential prerequisites include sufficient event flags, correctly configured SAP parameters (e.g., rdisp/tm_max_no), and a higher OS process count. While a single large instance may improve memory efficiency and load balancing, it raises risks of bottlenecks and complex monitoring. Conversely, multiple smaller instances mitigate resource contention but may increase overall process counts.
Key words :
active work processes increases slowly compared, parameter rdisp/tm_max_no specifies, long-running processing steps, long-running database queries, rdisp/tm_max_no > work processes + number, variable event keys exhausted, sessions lower total number, sap-internal event flag, lower main memory requirements, higher process change rate
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