All my SAP systems are on HPUX 10.20. We are going to implement these on to HPUX11, 64bit kernel. Can you suggest...
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or share about your experiences on this move? Thank you.
In my experience this move has been excellent (especially for HPUX)! Under HPUX, and 32 bit SAP/Oracle one could only allocate 1.75 gig of shared memory. This means that memory 'pools' like the ABAP buffer (ABAP/buffersize), extended memory (em/initial_size_KB), Oracle data buffer (db_block_buffers), Oracle shared pool (shared_pool_size) have to be watched very closely so as not to exceed the limit (as a total).
Once you move to 64-bit, this limit goes away. The only issue at that point are the appropriate Unix level kernel settings (shmmax, etc.), and the amount of real memory/swap space on the hardware. By moving to 64-bit, I have been able to consolidate some hardware to reduce overall costs.
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