Ralph, is it not the mpool_sm_max_size? 512MB seems to be the default
max size per node.
> Message: 1
> Date: Wed, 12 Nov 2008 07:21:38 -0700
> From: Ralph Castain <rhc_at_[hidden]>
> Subject: [OMPI devel] SM backing file size
> To: Open MPI Developers <devel_at_[hidden]>
> Message-ID: <A19CEFFE-C532-4B2E-999E-0815F579340C_at_[hidden]>
> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> Yo folks
> As has frequently been commented upon at one time or another, the
> shared memory backing file can be quite huge. There used to be a param
> for controlling this size, but I can't find it in 1.3 - or at least,
> the name or method for controlling file size has morphed into
> something I don't recognize.
> Can someone more familiar with that subsystem point me to one or more
> params that will allow us to control the size of that file? It is
> swamping our systems and causing OMPI to segfault.
- Pak Lui