a241bc4fed
1eff8279d did this for the leader, but neglected to consider that the
Material node may be below a Gather or Gather Merge and have parallel
workers also participate in the execution of the Material node.
Here we add EXPLAIN ANALYZE output to show Maximum Storage per worker
and all the required shared memory related code to get those details
back to the leader from each worker.
Because the prior code didn't have parallel worker processes report the
tuplestore usage details, this meant that the EXPLAIN ANALYZE output
didn't show the Maximum Storage when running debug_parallel_query =
regress. You could argue that fixing that should be a bug fix, but
fixing it would start reporting the Maximum Storage for Material nodes
for parallel workers during parallel queries, which feels more like a
new feature than a bug fix. The telemetery data going missing with
debug_parallel_query = regress isn't the end of the world, so let's just
fix this in master.
Author: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Tatsuya Kawata <kawatatatsuya0913@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAApHDvoUWCms-b27MpDKd5_RUFtAnVrxPgN9u3QoQbBihk+S6g@mail.gmail.comPostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
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