diff options
Diffstat (limited to 'src/backend/storage/lmgr/lock.c')
| -rw-r--r-- | src/backend/storage/lmgr/lock.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/src/backend/storage/lmgr/lock.c b/src/backend/storage/lmgr/lock.c index 9699469e6d3..e53415cc5f8 100644 --- a/src/backend/storage/lmgr/lock.c +++ b/src/backend/storage/lmgr/lock.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.141 2004/09/28 20:46:32 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/storage/lmgr/lock.c,v 1.142 2004/09/29 15:15:55 tgl Exp $ * * NOTES * Outside modules can create a lock table and acquire/release @@ -1689,15 +1689,17 @@ LockReassignCurrentOwner(void) } +/* + * Estimate shared-memory space used for lock tables + */ int LockShmemSize(int maxBackends) { int size = 0; long max_table_size = NLOCKENTS(maxBackends); - size += MAXALIGN(sizeof(PROC_HDR)); /* ProcGlobal */ - size += maxBackends * MAXALIGN(sizeof(PGPROC)); /* each MyProc */ - size += MAX_LOCK_METHODS * MAXALIGN(sizeof(LockMethodData)); /* each lock method */ + /* lock method headers */ + size += MAX_LOCK_METHODS * MAXALIGN(sizeof(LockMethodData)); /* lockHash table */ size += hash_estimate_size(max_table_size, sizeof(LOCK)); @@ -1706,6 +1708,9 @@ LockShmemSize(int maxBackends) size += hash_estimate_size(max_table_size, sizeof(PROCLOCK)); /* + * Note we count only one pair of hash tables, since the userlocks + * table actually overlays the main one. + * * Since the lockHash entry count above is only an estimate, add 10% * safety margin. */ |