Hi,
Please look for a configuration parameter under global.ini/memorymanager/
allocationlimit
For a scale out system with multiple IndexServer check if you see different settings under DEFAULT, SYSTEM and HOSTS columns
This should help under stand if you have a wrong configuration that is causing the memory limitations
I suggest you also check if the table redistribution is in place according to SAP suggestions on the Scale out system? This could also be responsible for the non uniform memory usage on the HANA system
Hope it helps
Sunil