Simplify some code in logical replication launcher

Avoid unnecessary locking calls when a subscription is disabled.

Author: Yugo Nagata <nagata@sraoss.co.jp>

diff --git a/src/backend/replication/logical/launcher.c b/src/backend/replication/logical/launcher.c
index 4c6d4b27723ea2fc3699077a7cd1869907549dfe..6c894421a396214027dd083eb008edd46a3ea196 100644 (file)
--- a/src/backend/replication/logical/launcher.c
+++ b/src/backend/replication/logical/launcher.c
@@ -929,11 +929,14 @@ ApplyLauncherMain(Datum main_arg)
                Subscription *sub = (Subscription *) lfirst(lc);
                LogicalRepWorker *w;
 
+               if (!sub->enabled)
+                   continue;
+
                LWLockAcquire(LogicalRepWorkerLock, LW_SHARED);
                w = logicalrep_worker_find(sub->oid, InvalidOid, false);
                LWLockRelease(LogicalRepWorkerLock);
 
-               if (sub->enabled && w == NULL)
+               if (w == NULL)
                {
                    last_start_time = now;
                    wait_time = wal_retrieve_retry_interval;