FWIW on Luminous / Ubunto Trusty (at least) I would sometimes find a handful to tens of GB “released” by tcmalloc but not reclaimed. In such circumstances a “heap release” usually did wonders to free up physmem / VM. YMMV. > > >> - AND... there is no guarantee that the kernel will actually reclaim memory that OSDs release/unmap > Correct, we can't explicitly force the kernel to reclaim memory. _______________________________________________ Dev mailing list -- dev@xxxxxxx To unsubscribe send an email to dev-leave@xxxxxxx