remove semaphore and fix push metrics

management/server/peer.go

@@ -1264,7 +1264,6 @@ func (am *DefaultAccountManager) UpdateAccountPeers(ctx context.Context, account
 	}
 
 	var wg sync.WaitGroup
-	semaphore := make(chan struct{}, 10)
 
 	dnsCache := &DNSConfigCache{}
 	dnsDomain := am.GetDNSDomain(account.Settings)
@@ -1297,10 +1296,8 @@ func (am *DefaultAccountManager) UpdateAccountPeers(ctx context.Context, account
 		}
 
 		wg.Add(1)
-		semaphore <- struct{}{}
 		go func(p *nbpeer.Peer) {
 			defer wg.Done()
-			defer func() { <-semaphore }()
 
 			start := time.Now()
 
@@ -1339,8 +1336,6 @@ func (am *DefaultAccountManager) UpdateAccountPeers(ctx context.Context, account
 		}(peer)
 	}
 
-	//
-
 	wg.Wait()
 	if am.metrics != nil {
 		am.metrics.AccountManagerMetrics().CountUpdateAccountPeersDuration(time.Since(globalStart))

management/server/update_buffer.go

@@ -26,13 +26,14 @@ func (b *UpdateBuffer) Push(update *UpdateMessage) {
 	defer b.mu.Unlock()
 
 	if b.update == nil || update.Update.NetworkMap.Serial > b.update.Update.NetworkMap.Serial || b.update.Update.NetworkMap.Serial == 0 {
-		b.update = update
-		b.cond.Signal()
 		if b.update == nil {
 			b.metrics.CountBufferPush()
 			return
 		}
 
+		b.update = update
+		b.cond.Signal()
+
 		b.metrics.CountBufferOverwrite()
 		return
 	}