On Sun, Mar 22, 2015 at 12:16:22AM +0300, Dmitry Morozovsky wrote:
> On Sat, 21 Mar 2015, Konstantin Belousov wrote:
>
> > > > Somewhat modernize the SysV shm code:
> > >
> > > Interesting.
> > >
> > > Is my understanding correct that postgres still uses shm? If so,
> > > has someone benchmarked the speedup?
> >
> > Yes, some versions of Postgres still use SysV shm.
>
> To be clarified: IIUC, *all* contemporary versions of PostgreSQL do
> use SHM for shatrd buffers (as PgSQL use process-per-connection model)
>
No. Recent versions use mmaped shared region for buffers.
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