On Tue, Feb 18, 2020 at 06:51:29PM +0530, Amit Kapila wrote: > On Tue, Feb 18, 2020 at 5:59 PM Ants Aasma <a...@cybertec.at> wrote: > > > > On Tue, 18 Feb 2020 at 12:20, Amit Kapila <amit.kapil...@gmail.com> wrote: > > > This is something similar to what I had also in mind for this idea. I > > > had thought of handing over complete chunk (64K or whatever we > > > decide). The one thing that slightly bothers me is that we will add > > > some additional overhead of copying to and from shared memory which > > > was earlier from local process memory. And, the tokenization (finding > > > line boundaries) would be serial. I think that tokenization should be > > > a small part of the overall work we do during the copy operation, but > > > will do some measurements to ascertain the same. > > > > I don't think any extra copying is needed. > > I am talking about access to shared memory instead of the process > local memory. I understand that an extra copy won't be required.
Isn't accessing shared memory from different pieces of execution what threads were designed to do? Best, David. -- David Fetter <david(at)fetter(dot)org> http://fetter.org/ Phone: +1 415 235 3778 Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate
