1、系统se38/rsmemory的原来配置；

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2、某SAP BW On HANA系统内存分配情况；

#---------------------------------------------------------------------
#Values proposed by SAP for shared memory pool sizes
#---------------------------------------------------------------------

ztta/roll_extension = 8000000000
ipc/shm_psize_10 = 456000000
ipc/shm_psize_40 = 1900000000
abap/heap_area_dia = 8000000000
abap/heap_area_nondia = 8000000000
abap/heap_area_total = 16000000000

#---------------------------------------------------------------------
#Others Values
#---------------------------------------------------------------------

zcsa/system_language = 1
zcsa/installed_languages = 1EM

zcsa/second_language = E
is/SMTP/virt_host_1 = *:250$$
icm/host_name_full = sapprd2.ccp.com.cn
gw/acl_mode = 0

3、Memory allocation sequence to work processes

https://blogs.sap.com/2012/12/01/memory-allocation-sequence-to-work-processes/

Summary:  ztta/roll_first---> Extended memory --->roll area--->local heap memory---> WP goto PRIV mode