diff --git a/erigon-lib/downloader/downloadercfg/downloadercfg.go b/erigon-lib/downloader/downloadercfg/downloadercfg.go
index a9aaf1beccc..d1051af0b97 100644
--- a/erigon-lib/downloader/downloadercfg/downloadercfg.go
+++ b/erigon-lib/downloader/downloadercfg/downloadercfg.go
@@ -17,6 +17,7 @@
 package downloadercfg
 
 import (
+	"github.com/ledgerwatch/erigon-lib/common/dbg"
 	"net"
 	"net/url"
 	"os"
@@ -65,7 +66,7 @@ func Default() *torrent.ClientConfig {
 	// better don't increase because erigon periodically producing "new seedable files" - and adding them to downloader.
 	// it must not impact chain tip sync - so, limit resources to minimum by default.
 	// but when downloader is started as a separated process - rise it to max
-	//torrentConfig.PieceHashersPerTorrent = cmp.Max(1, runtime.NumCPU()-1)
+	torrentConfig.PieceHashersPerTorrent = dbg.EnvInt("DL_HASHERS", min(16, max(2, runtime.NumCPU()-2)))
 
 	torrentConfig.MinDialTimeout = 6 * time.Second    //default: 3s
 	torrentConfig.HandshakesTimeout = 8 * time.Second //default: 4s