diff options
Diffstat (limited to 'src/include/storage/proc.h')
| -rw-r--r-- | src/include/storage/proc.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h index 86c5f998c77..9f9b3fcfbf1 100644 --- a/src/include/storage/proc.h +++ b/src/include/storage/proc.h @@ -86,6 +86,14 @@ struct XidCache */ extern PGDLLIMPORT int FastPathLockGroupsPerBackend; +/* + * Define the maximum number of fast-path locking groups per backend. + * This must be a power-of-two value. The actual number of fast-path + * lock groups is calculated in InitializeFastPathLocks() based on + * max_locks_per_transaction. 1024 is an arbitrary upper limit (matching + * max_locks_per_transaction = 16k). Values over 1024 are unlikely to be + * beneficial as there are bottlenecks we'll hit way before that. + */ #define FP_LOCK_GROUPS_PER_BACKEND_MAX 1024 #define FP_LOCK_SLOTS_PER_GROUP 16 /* don't change */ #define FastPathLockSlotsPerBackend() \ |