diff --git a/cmd/zurg/main.go b/cmd/zurg/main.go
index b74da01..b52100b 100644
--- a/cmd/zurg/main.go
+++ b/cmd/zurg/main.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"runtime"
 	"syscall"
 	"time"
 
@@ -44,13 +45,15 @@ func main() {
 		}
 	}
 
+	log.Debugf("Initializing chunk manager, cores: %d", runtime.NumCPU())
+	// 64kb request size
 	chunkMgr, err := chunk.NewManager(
 		"",
-		524288, // 1MB
-		4,      // 4 threads
-		4,      // 4 threads
-		4,      // 4 threads
-		4,      // 4 chunks (4MB)
+		524288,                     // 512kb
+		1,                          // 1 chunk - load ahead (1MB total)
+		max(runtime.NumCPU()/2, 1), // check threads
+		max(runtime.NumCPU()/2, 1), // load threads
+		runtime.NumCPU()*2,         // max chunks
 		config)
 	if nil != err {
 		log.Panicf("Failed to initialize chunk manager: %v", err)