#include <db_cxx.h>

int
DbEnv::get_mp_mmapsize(size_t *mp_mmapsizep);

The DbEnv::get_mp_mmapsize() method returns the the maximum file size, in bytes, for a file to be mapped into the process address space. This value can be managed using the DbEnv::set_mp_mmapsize() method.

The DbEnv::get_mp_mmapsize() method may be called at any time during the life of the application.

The DbEnv::get_mp_mmapsize() method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.