Solution : https://service.sap.com/sap/support/notes/715400 (SAP Service marketplace login required)
Summary :
This SAP Note addresses an issue where high load tests using the Internet Communication Manager (ICM) lead to premature termination of connections when over 2,000 HTTP connections are open simultaneously within the keep-alive timeout interval. The limitation is due to ICM's requirement of two event flags per memory pipe, leading to a maximum of 8,000 event flags and consequently 4,000 MPIs and 2,000 open connections. A kernel patch has been released to increase the MPI count to 20,000, requiring 40,000 operating system semaphores. Users must configure their systems, especially on various operating systems (Linux, Windows, AIX, True64, Solaris, HPUX) to ensure sufficient semaphore availability.
Key words :
semaem 16384 semmni 500 semmns 50000 semmnu 256 semume 100 semvmx 32767for mpi/max_pipes, semaem 16384 semmni 1000 semmns 50000 semmnu 256 semume 100 semvmx 32767, /pseries/en_us/aixprggd/genprogc/ipc_limits, perform high load tests, profile parameter mpi/max_pipes, change operating system parameters, ipc / sem_mni 1024 ipc / sem_msl 512, profile parameter values, internet communication manager, -alive timeout interval
Related Notes :
| 737625 | Parameter recommendations for the ICM |
| 716915 | CST Patch Collection 12 2004 |
| 715045 | Number of event flags increased to 50,000 for Web Dispatcher |
| 552286 | Troubleshooting for the SAP Web Dispatcher |