diff options
Diffstat (limited to 'src/backend/commands/async.c')
| -rw-r--r-- | src/backend/commands/async.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/backend/commands/async.c b/src/backend/commands/async.c index 3b71174b826..91baede4e36 100644 --- a/src/backend/commands/async.c +++ b/src/backend/commands/async.c @@ -224,6 +224,7 @@ typedef struct QueueBackendStatus * When holding the lock in EXCLUSIVE mode, backends can inspect the entries * of other backends and also change the head and tail pointers. * + * AsyncCtlLock is used as the control lock for the pg_notify SLRU buffers. * In order to avoid deadlocks, whenever we need both locks, we always first * get AsyncQueueLock and then AsyncCtlLock. * @@ -234,7 +235,7 @@ typedef struct QueueBackendStatus typedef struct AsyncQueueControl { QueuePosition head; /* head points to the next free location */ - QueuePosition tail; /* the global tail is equivalent to the tail + QueuePosition tail; /* the global tail is equivalent to the pos * of the "slowest" backend */ TimestampTz lastQueueFillWarn; /* time of last queue-full msg */ QueueBackendStatus backend[FLEXIBLE_ARRAY_MEMBER]; |