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Eliminate "parallel degree" terminology.

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This terminology provoked widespread complaints.  So, instead, rename
the GUC max_parallel_degree to max_parallel_workers_per_gather
(leaving room for a possible future GUC max_parallel_workers that acts
as a system-wide limit), and rename the parallel_degree reloption to
parallel_workers.  Rename structure members to match.

These changes create a dump/restore hazard for users of PostgreSQL
9.6beta1 who have set the reloption (or applied the GUC using ALTER
USER or ALTER DATABASE).
This commit is contained in:
Robert Haas
2016-06-09 09:08:27 -04:00
parent 6581e930a8
commit c9ce4a1c61
19 changed files with 99 additions and 99 deletions
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4
src/backend/utils/misc/guc.c
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@@ -2648,11 +2648,11 @@ static struct config_int ConfigureNamesInt[] =
},
{
{"max_parallel_degree", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
{"max_parallel_workers_per_gather", PGC_USERSET, RESOURCES_ASYNCHRONOUS,
gettext_noop("Sets the maximum number of parallel processes per executor node."),
NULL
},
&max_parallel_degree,
&max_parallel_workers_per_gather,
2, 0, 1024,
NULL, NULL, NULL
},

2
src/backend/utils/misc/postgresql.conf.sample
View File

@@ -167,7 +167,7 @@
#effective_io_concurrency = 1 # 1-1000; 0 disables prefetching
#max_worker_processes = 8 # (change requires restart)
#max_parallel_degree = 2 # max number of worker processes per node
#max_parallel_workers_per_gather = 2 # taken from max_worker_processes
#old_snapshot_threshold = -1 # 1min-60d; -1 disables; 0 is immediate
# (change requires restart)
#backend_flush_after = 0 # 0 disables,