Re: Let's make PostgreSQL multi-threaded

On 2023-06-08 10:33:26 -0400, Greg Stark wrote:
> On Wed, 7 Jun 2023 at 18:09, Andres Freund <andres@anarazel.de> wrote:
> > Having the same memory mapping between threads makes allows the
> > hardware to share the TLB (on x86 via process context identifiers), which
> > isn't realistically possible with different processes.
> 
> As a matter of historical interest Solaris actually did implement this
> across different processes. It was called by the somewhat unfortunate
> name "Intimate Shared Memory". I don't think Linux ever implemented
> anything like it but I'm not sure.

I don't think it shared the TLB - it did share page tables though.