diff --git a/pkg/config/application_config_test.go b/pkg/config/application_config_test.go
index 6b5af8d81..767e3942c 100644
--- a/pkg/config/application_config_test.go
+++ b/pkg/config/application_config_test.go
@@ -206,20 +206,6 @@ func TestNeoFSBlockFetcherValidation(t *testing.T) {
 			shouldFail: true,
 			errMsg:     "BQueueSize (5) is lower than OIDBatchSize (10)",
 		},
-		{
-			cfg: NeoFSBlockFetcher{
-				InternalService:      InternalService{Enabled: true},
-				Timeout:              time.Second,
-				ContainerID:          validContainerID,
-				Addresses:            []string{"127.0.0.1"},
-				OIDBatchSize:         10,
-				BQueueSize:           20,
-				SkipIndexFilesSearch: false,
-				IndexFileSize:        0,
-			},
-			shouldFail: true,
-			errMsg:     "IndexFileSize is not set",
-		},
 	}
 
 	for _, c := range cases {
diff --git a/pkg/config/blockfetcher_config.go b/pkg/config/blockfetcher_config.go
index 22d4d46a0..65abc6295 100644
--- a/pkg/config/blockfetcher_config.go
+++ b/pkg/config/blockfetcher_config.go
@@ -38,14 +38,11 @@ func (cfg *NeoFSBlockFetcher) Validate() error {
 	if err != nil {
 		return fmt.Errorf("invalid container ID: %w", err)
 	}
-	if cfg.BQueueSize < cfg.OIDBatchSize {
+	if cfg.BQueueSize > 0 && cfg.BQueueSize < cfg.OIDBatchSize {
 		return fmt.Errorf("BQueueSize (%d) is lower than OIDBatchSize (%d)", cfg.BQueueSize, cfg.OIDBatchSize)
 	}
 	if len(cfg.Addresses) == 0 {
 		return errors.New("addresses are not set")
 	}
-	if !cfg.SkipIndexFilesSearch && cfg.IndexFileSize == 0 {
-		return errors.New("IndexFileSize is not set")
-	}
 	return nil
 }
diff --git a/pkg/network/server.go b/pkg/network/server.go
index 6b043544a..1d4377462 100644
--- a/pkg/network/server.go
+++ b/pkg/network/server.go
@@ -224,6 +224,9 @@ func newServerFromConstructors(config ServerConfig, chain Ledger, stSync StateSy
 	}, bqueue.DefaultCacheSize, updateBlockQueueLenMetric, bqueue.NonBlocking)
 
 	s.bSyncQueue = bqueue.New(s.stateSync, log, nil, bqueue.DefaultCacheSize, updateBlockQueueLenMetric, bqueue.NonBlocking)
+	if s.NeoFSBlockFetcherCfg.BQueueSize <= 0 {
+		s.NeoFSBlockFetcherCfg.BQueueSize = blockfetcher.DefaultQueueCacheSize
+	}
 	s.bFetcherQueue = bqueue.New(chain, log, nil, s.NeoFSBlockFetcherCfg.BQueueSize, updateBlockQueueLenMetric, bqueue.Blocking)
 	var err error
 	s.blockFetcher, err = blockfetcher.New(chain, s.NeoFSBlockFetcherCfg, log, s.bFetcherQueue.PutBlock,
diff --git a/pkg/services/blockfetcher/blockfetcher.go b/pkg/services/blockfetcher/blockfetcher.go
index 90a0e53fc..d6f73426d 100644
--- a/pkg/services/blockfetcher/blockfetcher.go
+++ b/pkg/services/blockfetcher/blockfetcher.go
@@ -32,11 +32,17 @@ const (
 	// oidSize is the size of the object ID in NeoFS.
 	oidSize = sha256.Size
 	// defaultTimeout is the default timeout for NeoFS requests.
-	defaultTimeout = 5 * time.Minute
-	// defaultOIDBatchSize is the default number of OIDs to search and fetch at once.
-	defaultOIDBatchSize = 8000
+	defaultTimeout = 10 * time.Minute
+	// DefaultQueueCacheSize is the default size of the queue cache.
+	DefaultQueueCacheSize = 16000
 	// defaultDownloaderWorkersCount is the default number of workers downloading blocks.
-	defaultDownloaderWorkersCount = 100
+	defaultDownloaderWorkersCount = 500
+	// defaultIndexFileSize is the default size of the index file.
+	defaultIndexFileSize = 128000
+	// DefaultBlockAttribute is the default attribute name for block objects.
+	defaultBlockAttribute = "Block"
+	// defaultIndexFileAttribute is the default attribute name for index file objects.
+	defaultIndexFileAttribute = "Index"
 )
 
 // Constants related to NeoFS pool request timeouts.
@@ -146,13 +152,19 @@ func New(chain Ledger, cfg config.NeoFSBlockFetcher, logger *zap.Logger, putBloc
 		cfg.Timeout = defaultTimeout
 	}
 	if cfg.OIDBatchSize <= 0 {
-		cfg.OIDBatchSize = defaultOIDBatchSize
+		cfg.OIDBatchSize = cfg.BQueueSize / 2
 	}
 	if cfg.DownloaderWorkersCount <= 0 {
 		cfg.DownloaderWorkersCount = defaultDownloaderWorkersCount
 	}
-	if len(cfg.Addresses) == 0 {
-		return nil, errors.New("no addresses provided")
+	if cfg.IndexFileSize <= 0 {
+		cfg.IndexFileSize = defaultIndexFileSize
+	}
+	if cfg.BlockAttribute == "" {
+		cfg.BlockAttribute = defaultBlockAttribute
+	}
+	if cfg.IndexFileAttribute == "" {
+		cfg.IndexFileAttribute = defaultIndexFileAttribute
 	}
 
 	params := pool.DefaultOptions()
diff --git a/pkg/services/blockfetcher/blockfetcher_test.go b/pkg/services/blockfetcher/blockfetcher_test.go
index eda5f2864..1ecd6744d 100644
--- a/pkg/services/blockfetcher/blockfetcher_test.go
+++ b/pkg/services/blockfetcher/blockfetcher_test.go
@@ -65,7 +65,8 @@ func TestServiceConstructor(t *testing.T) {
 			InternalService: config.InternalService{
 				Enabled: true,
 			},
-			Addresses: []string{"localhost:8080"},
+			Addresses:  []string{"localhost:8080"},
+			BQueueSize: DefaultQueueCacheSize,
 		}
 		service, err := New(ledger, cfg, logger, mockPut.putBlock, shutdownCallback)
 		require.NoError(t, err)
@@ -73,7 +74,7 @@ func TestServiceConstructor(t *testing.T) {
 
 		require.Equal(t, service.IsActive(), false)
 		require.Equal(t, service.cfg.Timeout, defaultTimeout)
-		require.Equal(t, service.cfg.OIDBatchSize, defaultOIDBatchSize)
+		require.Equal(t, service.cfg.OIDBatchSize, DefaultQueueCacheSize/2)
 		require.Equal(t, service.cfg.DownloaderWorkersCount, defaultDownloaderWorkersCount)
 		require.Equal(t, service.IsActive(), false)
 	})