config.go | 7 ++++---

diff --git a/config.go b/config.go
index ff222b325e828e7d4093e5ed0cfc65034eea4d75..860f6cd19a6d96d2317b9e3d4637e61d31834964 100644
--- a/config.go
+++ b/config.go
@@ -130,16 +130,17 @@ 	if cfg.MinDialTimeout == 0 {
 		cfg.MinDialTimeout = 5 * time.Second
 	}
 	if cfg.EstablishedConnsPerTorrent == 0 {
-		cfg.EstablishedConnsPerTorrent = 80
+		cfg.EstablishedConnsPerTorrent = 50
 	}
 	if cfg.HalfOpenConnsPerTorrent == 0 {
-		cfg.HalfOpenConnsPerTorrent = 80
+		cfg.HalfOpenConnsPerTorrent = (cfg.EstablishedConnsPerTorrent + 1) / 2
 	}
 	if cfg.TorrentPeersHighWater == 0 {
+		// Memory and freshness are the concern here.
 		cfg.TorrentPeersHighWater = 500
 	}
 	if cfg.TorrentPeersLowWater == 0 {
-		cfg.TorrentPeersLowWater = 50
+		cfg.TorrentPeersLowWater = 2 * cfg.HalfOpenConnsPerTorrent
 	}
 	if cfg.HandshakesTimeout == 0 {
 		cfg.HandshakesTimeout = 20 * time.Second