diff options
Diffstat (limited to 'src/backend/port/sysv_sema.c')
| -rw-r--r-- | src/backend/port/sysv_sema.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/port/sysv_sema.c b/src/backend/port/sysv_sema.c index 5b88a92bc95..68835723b90 100644 --- a/src/backend/port/sysv_sema.c +++ b/src/backend/port/sysv_sema.c @@ -50,8 +50,14 @@ typedef int IpcSemaphoreId; /* semaphore ID returned by semget(2) */ * we allocate. It must be *less than* your kernel's SEMMSL (max semaphores * per set) parameter, which is often around 25. (Less than, because we * allocate one extra sema in each set for identification purposes.) + * + * The present value of 19 is chosen with one eye on NetBSD/OpenBSD's default + * SEMMNS setting of 60. Remembering the extra sema per set, this lets us + * allocate three sets with 57 useful semaphores before exceeding that, which + * is enough to run our core regression tests. Users of those systems will + * still want to raise SEMMNS for any sort of production work, though. */ -#define SEMAS_PER_SET 16 +#define SEMAS_PER_SET 19 #define IPCProtection (0600) /* access/modify by user only */ |