On Thu, Feb 23, 2017 at 08:17:54PM +0530, hari.prasath wrote: > I am trying to get some 15MB of shared memory using ShmemAlloc. > > Cross checked all my kernal variables set in OS level and also in > postgresql.conf. > > Cant able to get the required memory(15MB) but if i try with some small > memory(1MB), its working fine. > > Am i missing something.?
Assuming you're talking about some C extension, you have to request in _PG_INIT() the amount of shmem you'll need, with RequestAddinShmemSpace(). You can see an example in pg_stat_statements.c how it's done (_PG_INIT() and pgss_shmem_startup()). Asking a small amount probably works because some shared memory is requested but not totally used as soon as the server starts. Regards. -- Julien Rouhaud http://dalibo.com - http://dalibo.org -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
