On Wed, May 15, 2013 at 12:26:52PM +0530, Amit Kapila wrote: > On Monday, May 13, 2013 7:59 PM Noah Misch wrote: > > We can allocate a small amount of permanent shared memory for > > coordination > > among a group of processes, but sorting will benefit from a region as > > large as > > maintenance_work_mem. Expect on-demand memory sharing. > > Will the shared memory used for coordinating tuples between master and > worker be fixed or varying depending on size of tuples to be sorted or > number of workers associated. > If it is varying, then it can sometimes encounter situation where required > memory is not available and in that case it has to revert to serial sorting
> How will the parallel sorting tasks be divided and assigned to each worker? I haven't selected answers for those details, yet. -- Noah Misch EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
