Avoid locking operations in postmaster

knizhnik · knizhnik · commit 62566b2cd853 · 2018-12-28T20:05:57.000+03:00
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
@@ -4390,7 +4390,7 @@ ScheduleSession(DatabasePool *pool, Port *port)
 			Assert(false);
 		}
 		if (!worker->proc)
-			worker->proc = BackendPidGetProc(worker->pid);
+			worker->proc = BackendPidGetProcWithLock(worker->pid);
 
 		if (worker->proc && worker->n_sessions - worker->proc->nFinishedSessions >= MaxSessions)
 		{

Original file line number	Diff line number	Diff line change
`@@ -4390,7 +4390,7 @@ ScheduleSession(DatabasePool pool, Port port)`
`4390`	`4390`	`Assert(false);`
`4391`	`4391`	`}`
`4392`	`4392`	`if (!worker->proc)`
`4393`		`- worker->proc = BackendPidGetProc(worker->pid);`
	`4393`	`+ worker->proc = BackendPidGetProcWithLock(worker->pid);`
`4394`	`4394`
`4395`	`4395`	`if (worker->proc && worker->n_sessions - worker->proc->nFinishedSessions >= MaxSessions)`
`4396`	`4396`	`{`