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Rename ReservedBackends variable to SuperuserReservedConnections.

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This is in preparation for adding a new reserved_connections GUC,
but aligning the GUC name with the variable name is also a good
idea on general principle.

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 15:32:08 -05:00
parent 6c1d5ba486
commit fe00fec1f5
4 changed files with 14 additions and 14 deletions
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20
src/backend/postmaster/postmaster.c
View File

@ -204,15 +204,15 @@ char *Unix_socket_directories;
char *ListenAddresses; char *ListenAddresses;
/* /*
* ReservedBackends is the number of backends reserved for superuser use. * SuperuserReservedConnections is the number of backends reserved for
* This number is taken out of the pool size given by MaxConnections so * superuser use. This number is taken out of the pool size given by
* number of backend slots available to non-superusers is * MaxConnections so number of backend slots available to non-superusers is
* (MaxConnections - ReservedBackends). Note what this really means is * (MaxConnections - SuperuserReservedConnections). Note what this really
* "if there are <= ReservedBackends connections available, only superusers * means is "if there are <= SuperuserReservedConnections connections
* can make new connections" --- pre-existing superuser connections don't * available, only superusers can make new connections" --- pre-existing
* count against the limit. * superuser connections don't count against the limit.
*/ */
int ReservedBackends; int SuperuserReservedConnections;
/* The socket(s) we're listening to. */ /* The socket(s) we're listening to. */
#define MAXLISTEN 64 #define MAXLISTEN 64
@ -908,11 +908,11 @@ PostmasterMain(int argc, char *argv[])
/* /*
* Check for invalid combinations of GUC settings. * Check for invalid combinations of GUC settings.
*/ */
if (ReservedBackends >= MaxConnections) if (SuperuserReservedConnections >= MaxConnections)
{ {
write_stderr("%s: superuser_reserved_connections (%d) must be less than max_connections (%d)\n", write_stderr("%s: superuser_reserved_connections (%d) must be less than max_connections (%d)\n",
progname, progname,
ReservedBackends, MaxConnections); SuperuserReservedConnections, MaxConnections);
ExitPostmaster(1); ExitPostmaster(1);
} }
if (XLogArchiveMode > ARCHIVE_MODE_OFF && wal_level == WAL_LEVEL_MINIMAL) if (XLogArchiveMode > ARCHIVE_MODE_OFF && wal_level == WAL_LEVEL_MINIMAL)

4
src/backend/utils/init/postinit.c
View File

@ -927,8 +927,8 @@ InitPostgres(const char *in_dbname, Oid dboid,
* limited by max_connections or superuser_reserved_connections. * limited by max_connections or superuser_reserved_connections.
*/ */
if (!am_superuser && !am_walsender && if (!am_superuser && !am_walsender &&
ReservedBackends > 0 && SuperuserReservedConnections > 0 &&
!HaveNFreeProcs(ReservedBackends)) !HaveNFreeProcs(SuperuserReservedConnections))
ereport(FATAL, ereport(FATAL,
(errcode(ERRCODE_TOO_MANY_CONNECTIONS), (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
errmsg("remaining connection slots are reserved for superusers"))); errmsg("remaining connection slots are reserved for superusers")));

2
src/backend/utils/misc/guc_tables.c
View File

@ -2163,7 +2163,7 @@ struct config_int ConfigureNamesInt[] =
gettext_noop("Sets the number of connection slots reserved for superusers."), gettext_noop("Sets the number of connection slots reserved for superusers."),
NULL NULL
}, },
&ReservedBackends, &SuperuserReservedConnections,
3, 0, MAX_BACKENDS, 3, 0, MAX_BACKENDS,
NULL, NULL, NULL NULL, NULL, NULL
}, },

2
src/include/postmaster/postmaster.h
View File

@ -15,7 +15,7 @@
/* GUC options */ /* GUC options */
extern PGDLLIMPORT bool EnableSSL; extern PGDLLIMPORT bool EnableSSL;
extern PGDLLIMPORT int ReservedBackends; extern PGDLLIMPORT int SuperuserReservedConnections;
extern PGDLLIMPORT int PostPortNumber; extern PGDLLIMPORT int PostPortNumber;
extern PGDLLIMPORT int Unix_socket_permissions; extern PGDLLIMPORT int Unix_socket_permissions;
extern PGDLLIMPORT char *Unix_socket_group; extern PGDLLIMPORT char *Unix_socket_group;