diff options
| author | Robert Haas <rhaas@postgresql.org> | 2017-11-15 08:17:29 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2017-11-15 08:23:18 -0500 |
| commit | e5253fdc4f5fe2f38aec47e08c6aee93f934183d (patch) | |
| tree | b32d139116adab712dea0cb4ac02a939ff4aebd6 /src/backend/utils/misc/guc.c | |
| parent | 7518049980be1d90264addab003476ae105f70d4 (diff) | |
Add parallel_leader_participation GUC.
Sometimes, for testing, it's useful to have the leader do nothing but
read tuples from workers; and it's possible that could work out better
even in production.
Thomas Munro, reviewed by Amit Kapila and by me. A few final tweaks
by me.
Discussion: http://postgr.es/m/CAEepm=2U++Lp3bNTv2Bv_kkr5NE2pOyHhxU=G0YTa4ZhSYhHiw@mail.gmail.com
Diffstat (limited to 'src/backend/utils/misc/guc.c')
| -rw-r--r-- | src/backend/utils/misc/guc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c index c4c1afa084b..6dcd738be64 100644 --- a/src/backend/utils/misc/guc.c +++ b/src/backend/utils/misc/guc.c @@ -1676,6 +1676,16 @@ static struct config_bool ConfigureNamesBool[] = NULL, NULL, NULL }, + { + {"parallel_leader_participation", PGC_USERSET, RESOURCES_ASYNCHRONOUS, + gettext_noop("Controls whether Gather and Gather Merge also run subplans."), + gettext_noop("Should gather nodes also run subplans, or just gather tuples?") + }, + ¶llel_leader_participation, + true, + NULL, NULL, NULL + }, + /* End-of-list marker */ { {NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL, NULL |