diff options
| author | Alexander Korotkov | 2024-04-06 21:31:43 +0000 |
|---|---|---|
| committer | Alexander Korotkov | 2024-04-06 21:49:53 +0000 |
| commit | 25f42429e2ff2acca35c9154fc2e36b75c79227a (patch) | |
| tree | a007e1ef361c34cef94c12d8e49bb2e3a2966928 /src/include | |
| parent | 1577081e9614345534a018e788a2c0bab4da4dc5 (diff) | |
Use an LWLock instead of a spinlock in waitlsn.c
This should prevent busy-waiting when number of waiting processes is high.
Discussion: https://postgr.es/m/202404030658.hhj3vfxeyhft%40alvherre.pgsql
Author: Alvaro Herrera
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/commands/waitlsn.h | 5 | ||||
| -rw-r--r-- | src/include/storage/lwlocklist.h | 1 |
2 files changed, 2 insertions, 4 deletions
diff --git a/src/include/commands/waitlsn.h b/src/include/commands/waitlsn.h index 0d80248682c..b3d9eed64d8 100644 --- a/src/include/commands/waitlsn.h +++ b/src/include/commands/waitlsn.h @@ -55,13 +55,10 @@ typedef struct WaitLSNState /* * A pairing heap of waiting processes order by LSN values (least LSN is - * on top). + * on top). Protected by WaitLSNLock. */ pairingheap waitersHeap; - /* A mutex protecting the pairing heap above */ - slock_t waitersHeapMutex; - /* An array with per-process information, indexed by the process number */ WaitLSNProcInfo procInfos[FLEXIBLE_ARRAY_MEMBER]; } WaitLSNState; diff --git a/src/include/storage/lwlocklist.h b/src/include/storage/lwlocklist.h index 85f6568b9e4..c2bab5a794e 100644 --- a/src/include/storage/lwlocklist.h +++ b/src/include/storage/lwlocklist.h @@ -83,3 +83,4 @@ PG_LWLOCK(49, WALSummarizer) PG_LWLOCK(50, DSMRegistry) PG_LWLOCK(51, InjectionPoint) PG_LWLOCK(52, SerialControl) +PG_LWLOCK(53, WaitLSN) |