Dynamic memory allocation on HP-UX for multiple instances on one host

[MarcelRabe]

Hi everyone,

I was wondering what the current possibilities are nowadays on running multiple SAP instances on one very large host with regard to resource sharing. Normally, for each instance, using PHYS_MEMSIZE etc you have to set the memory to a fixed size and then optimize it.

Preferrably we would like the memory to be allocated based upon actual usage. Is that possible at all? on HP-UX? Using third party techniques?

Thank you

Marcel Rabe

[JPReyes · Accepted solution]

i don't think thats possible as memory parameters are not dinamically switchable and need a system restart to take effect.

Regards

Juan

[former_member185954]

Hello Marcel,

As Juan said you may not be able to change the parameters at runtime.

The only parameters that can be dynamically switched are :

ztta/roll_first

ztta/roll_extension

ztta/roll_area

abap/heap_area_dia

abap/heap_area_nondia

abap/heap_area_total

em/stat_log_size_MB

em/stat_log_timeout

These parameters would put a cap on memory allocations, however they wouldn't help increase the total addressable memory area.

I would suggest that you consider Adaptive Computing for dynamic use of resources.

Regards,

Siddhesh