Am Sat, 8 Apr 2017 23:55:29 +0200 schrieb Alan McKinnon <alan.mckin...@gmail.com>:
> > Adding up all terms except 'tot' I get 5.6G where are the remaining > > 2G? And why is shmem 0.85G - I have even seen a value of 4G for > > shmem although all tempfs filesystems > > were nearly empty. > > Lots of things use shared memory. All you know here is that something > is using lots of it Shared memory is not tmpfs. If many processes load the same .so file, that memory is accounted for as shared memory: it's only mapped once into memory. Well, with PIC/PIE that is not necessarily true as the dynamic linker is patching the files (better speaking: the mapped memory pages) during load, so some parts become unshared, unless you are using prelink which should eliminate that factor to a great degree. Shared memory also includes what is allocated as shmem file descriptors (which in turn goes into tmpfs files, hence you thinking tmpfs is shmem). I think something is creating memory mapped files on your filesystem - it could explain why you're missing 2G of memory. If you don't use prelinking, 0.85G shmem looks perfectly normal to me. I have around half of it with a full-blown but fully prelinked system. -- Regards, Kai Replies to list-only preferred.
