On 04/11/2016 08:57 PM, Julien Rouhaud wrote:
>Expected = Expecting worker8 information , also loops=10 (including the
Even if you set a per-table parallel_degree higher than
max_parallel_degree, it'll be maxed at max_parallel_degree.

Then, the explain shows that the planner assumed it'll launch 9 workers,
but only 8 were available (or needed perhaps) at runtime.

Right, if we increase max_worker_processes value in postgresql.conf file then
we are able to see the worker information in explain plan.

if parallel_degree value is higher than max_parallel_degree i.e

parallel_degree = 20, max_parallel_degree=10 => [ select query accepting 10 workers ]

but in general where table doesn't have parallel_degree set and max_parallel_degree is
set to 10 then select query is showing only 2 workers .


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