On Sat, Jun 8, 2013 at 5:04 AM, Simon Riggs <si...@2ndquadrant.com> wrote:
> On 7 June 2013 20:23, Tom Lane <t...@sss.pgh.pa.us> wrote: > > > As for other databases, I suspect that ones that have parallel execution > > are probably doing it with a thread model not a process model. > > Separate processes are more common because it covers the general case > where query execution is spread across multiple nodes. Threads don't > work across nodes and parallel queries predate (working) threading > models. > Indeed. Parallelism based on processes would be more convenient for master-master type of applications. Even if no master-master feature is implemented directly in core, at least a parallelism infrastructure based on processes could be used for this purpose. -- Michael
