установить параметры выделения памяти (set memory allocation parameters)
Стандарты (Conforming to)
This function is not specified by POSIX or the C standards. A
similar function exists on many System V derivatives, but the
range of values for param varies across systems. The SVID
defined options M_MXFAST
, M_NLBLKS
, M_GRAIN
, and M_KEEP
, but only
the first of these is implemented in glibc.