From 1dfa529941643b486ceadb7f38cfd8f2b1f3d0eb Mon Sep 17 00:00:00 2001
From: bergquist <carl.bergquist@gmail.com>
Date: Tue, 5 Dec 2017 13:58:56 +0100
Subject: [PATCH] dashboards as cfg: avoid walking fs in parallel

---
 pkg/services/provisioning/dashboards/file_reader.go | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/pkg/services/provisioning/dashboards/file_reader.go b/pkg/services/provisioning/dashboards/file_reader.go
index 3491960e329..42f232bca82 100644
--- a/pkg/services/provisioning/dashboards/file_reader.go
+++ b/pkg/services/provisioning/dashboards/file_reader.go
@@ -64,16 +64,24 @@ func (fr *fileReader) getCache(key string) (*dashboards.SaveDashboardItem, bool)
 }
 
 func (fr *fileReader) ReadAndListen(ctx context.Context) error {
-	ticker := time.NewTicker(time.Second * 5)
+	ticker := time.NewTicker(time.Second * 3)
 
 	if err := fr.walkFolder(); err != nil {
 		fr.log.Error("failed to search for dashboards", "error", err)
 	}
 
+	running := false
+
 	for {
 		select {
 		case <-ticker.C:
-			fr.walkFolder()
+			if !running { // avoid walking the filesystem in parallel. incase fs is very slow.
+				running = true
+				go func() {
+					fr.walkFolder()
+					running = false
+				}()
+			}
 		case <-ctx.Done():
 			return nil
 		}