Обращаю внимание почтенной публики, про то что начиная с версии 8.0.3 в PB используется другой менеджер памяти.

Читаем в readme.txt для PB 8.0.3 Build 9704

"Section III: Memory Usage Improvements
======================================
Heap manager changed
--------------------
In order to improve memory management, the SybHeap manager replaces
SmartHeap 6.0.2 as the memory manager in this release. When blocks of
memory are freed, the SybHeap manager does not return them to the
operating system. Instead it maintains them in a free list for reuse .
The SybHeap manager generally uses less memory by more effectively
managing its free lists and reducing fragmentation."

Далее уже для PB 8.0.3 build 9850


Libjsybheap.dll - New file required for development and deployment
------------------------------------------------------------------
This PB 8.0.3 EBF build, includes a new DLL called libjsybheap.dll. This DLL must be installed into the Sybase\Shared\PowerBuilder folder along with the other PB DLLs (i.e., Pbdwe80.dll, etc.) or else the PB development environment will not start up.
This file provides the SybHeap memory manager, which replaces the SmartHeap 6.0.2 memory manager.

Теперь давайте посмотрим, что написано про менеджер памяти в файле PB901mr_fixes.htm

Change Request#: 289939 Priority: 0
Product Name: PB Enterprise - 8.0.2 OS: Microsoft Windows NT
Product Component: DW - Runtime

Fixed in Version #:
9.0.1

Description:
PowerBuilder 8 Build 9603 uses a new memory manager (versus SmartHeap), and with that build VERY LARGE allocations of memory for datastores are being reported and memory requirements SEEM to be 2x that of the SmartHeap builds.