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Add new GUC reserved_connections.

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This provides a way to reserve connection slots for non-superusers.
The slots reserved via the new GUC are available only to users who
have the new predefined role pg_use_reserved_connections.
superuser_reserved_connections remains as a final reserve in case
reserved_connections has been exhausted.

Patch by Nathan Bossart. Reviewed by Tushar Ahuja and by me.

Discussion: http://postgr.es/m/20230119194601.GA4105788@nathanxps13
This commit is contained in:
Robert Haas
2023-01-20 15:36:36 -05:00
parent fe00fec1f5
commit 6e2775e4d4
10 changed files with 115 additions and 25 deletions
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1
src/backend/utils/misc/postgresql.conf.sample
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@@ -63,6 +63,7 @@
# (change requires restart)
#port = 5432 # (change requires restart)
#max_connections = 100 # (change requires restart)
#reserved_connections = 0 # (change requires restart)
#superuser_reserved_connections = 3 # (change requires restart)
#unix_socket_directories = '/tmp' # comma-separated list of directories
# (change requires restart)