default of max_stack_depth

Hi,

The document says that the max_stack_depth is 2MB by default.
OTOH, in the source code, the variable max_stack_depth is
initialized with 100 (kB), and guc.c also uses 100 as the
default. Why?

This seems confusing to me though I know that
InitializeGUCOptions() sets max_stack_depth to 2MB.

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center