[ceph-users] Differences betwen heap stats and dump dump_mempools

Hello,all "ceph daemon osd.0 heap stats" or ceph daemon osd.0 dump_mempools" analyse memory of osd used. The "Virtual address space used" of "ceph daemon osd.0 heap stats" output is lager than total.bytes of "ceph daemon osd.0 dump_mempools"output. I dig into source code and I find the memory of "ceph daemon osd.0 heap stats" output is allocated by malloc. Is it contain memory of dump_mempools output? what differences betwen them? thanks for any reply.