Solution : https://service.sap.com/sap/support/notes/628131 (SAP Service marketplace login required)
Summary :
This SAP Note provides guidelines for configuring operating system parameters essential for the optimal operation of SAP DB 7.3.00, 7.4.03, and MaxDB versions 7.5 through 7.9. Incorrect OS parameter settings can lead to failures in starting SAP DB or to emergency shutdowns. Key settings include parameters for User Limits, Semaphore Identifiers, and Shared Memory, which involve critical components such as semmni, shmmni, and shmmax to avoid resource allocation issues. Recommendations are provided for various Unix versions alongside specific settings for systems like DEC True64, HP UX, IBM AIX, and Sun Solaris. It is emphasized that users re-login or restart services like x_server post-configuration changes to enforce new limits and avoid operational disruptions.
Key words :
>= 2048 soft data segment -1 soft stack size -1 soft core file size -1 soft file size -1 hard file size -1 hard cpu time -1 hard data segment -1 hard stack size -1 hard core file size -1, sun solaris maxheapsize memorysize = unlimited datasize = unlimited maxthread, dedicated 'core file size' parameter, dec tru64 maxheapsize address space limitations max_per_proc_address_space & per_proc_address_space, maximum file size, maximum stack size, data devspaces + log devspaces + system devspace, program size max_per_proc_stack_size & per_proc_stack_size, maxfilesize coredumpsize = unlimited file, maximum byte size
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