MEMORYALLOCATORDETAILS 
The system table SYSINFO.MEMORYALLOCATORDETAILS contains allocator details.
ALLOCATORNAME  | 
CHAR(40)  | 
Name of the allocator  | 
INITIALSIZE  | 
FIXED(20)  | 
Initial amount of memory reserved by the allocator (bytes)  | 
LIMITSIZE  | 
FIXED(20)  | 
Upper limit of memory that can be reserved by the allocator (bytes)  | 
SUPPLEMENTSIZE  | 
FIXED(20)  | 
Minimal number of bytes allocated from the base allocator when this allocator must grow  | 
CHECKLEVEL  | 
FIXED(20)  | 
Information about the current degree of allocator self-control (database parameter CheckAllocator)  | 
CALLSTACKLEVEL  | 
FIXED(20)  | 
Depth of the call stack stored for each allocated memory chunk  | 
MEMORYRETURNSTRATEGY  | 
CHAR(40)  | 
Decription of the strategy how memory is returned to the base allocator FREE_RAW_EXTENDS: all reserved memory may be returned to the base allocator FREE_RAW_EXTENDS_EXCEPT_INITIAL: all reserved memory except the initial size may be returned to the base allocator NOT_FREE_RAW_EXTENDS: no memory will be returned to the base allocator  |