From 49b7bf39120535f2f258847aeb911922b7b0a192 Mon Sep 17 00:00:00 2001 From: Tomas Vondra Date: Mon, 2 Sep 2024 02:19:16 +0200 Subject: [PATCH v20240902 4/4] separate guc to allow benchmarking --- src/backend/storage/lmgr/proc.c | 18 +++++++++--------- src/backend/utils/misc/guc_tables.c | 10 ++++++++++ 2 files changed, 19 insertions(+), 9 deletions(-) diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c index c3d2856b151..b25699a94c6 100644 --- a/src/backend/storage/lmgr/proc.c +++ b/src/backend/storage/lmgr/proc.c @@ -121,15 +121,15 @@ ProcGlobalShmemSize(void) * max_locks_per_xact = 16k. The default is max_locks_per_xact = 64, * which means 4 groups by default. */ - FastPathLockGroupsPerBackend = 1; - while (FastPathLockGroupsPerBackend < FP_LOCK_GROUPS_PER_BACKEND_MAX) - { - /* stop once we hit max_locks_per_xact */ - if (FastPathLockGroupsPerBackend * FP_LOCK_SLOTS_PER_GROUP >= max_locks_per_xact) - break; - - FastPathLockGroupsPerBackend *= 2; - } +// FastPathLockGroupsPerBackend = 1; +// while (FastPathLockGroupsPerBackend < FP_LOCK_GROUPS_PER_BACKEND_MAX) +// { +// /* stop once we hit max_locks_per_xact */ +// if (FastPathLockGroupsPerBackend * FP_LOCK_SLOTS_PER_GROUP >= max_locks_per_xact) +// break; +// +// FastPathLockGroupsPerBackend *= 2; +// } elog(LOG, "FastPathLockGroupsPerBackend = %d", FastPathLockGroupsPerBackend); diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c index 521ec5591c8..a6d4e0a8905 100644 --- a/src/backend/utils/misc/guc_tables.c +++ b/src/backend/utils/misc/guc_tables.c @@ -2788,6 +2788,16 @@ struct config_int ConfigureNamesInt[] = NULL, NULL, NULL }, + { + {"fastpath_lock_groups", PGC_POSTMASTER, LOCK_MANAGEMENT, + gettext_noop("Sets the maximum number of locks per transaction."), + gettext_noop("number of groups in the fast-path lock array.") + }, + &FastPathLockGroupsPerBackend, + 1, 1, INT_MAX, + NULL, NULL, NULL + }, + { {"max_pred_locks_per_transaction", PGC_POSTMASTER, LOCK_MANAGEMENT, gettext_noop("Sets the maximum number of predicate locks per transaction."), -- 2.46.0