diff --git a/app/main.go b/app/main.go
index 6f4c8d73..afdf81f9 100644
--- a/app/main.go
+++ b/app/main.go
@@ -91,7 +91,7 @@ func main() {
 	}()
 
 	exporter := migrator.Remark{DataStore: &dataService}
-	cache := rest.NewLoadingCache(4*time.Hour, 30*time.Second, postFlushFn)
+	cache := rest.NewLoadingCache(4*time.Hour, 1*time.Minute, postFlushFn)
 
 	activateBackup(&exporter)
 
diff --git a/app/rest/api/rss.go b/app/rest/api/rss.go
index 6f3b3a86..3b417f57 100644
--- a/app/rest/api/rss.go
+++ b/app/rest/api/rss.go
@@ -27,7 +27,7 @@ func (s *Rest) rssPostCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	sort := "-time"
 	log.Printf("[DEBUG] get rss for post %+v", locator)
 
-	data, err := s.Cache.Get(rest.URLKey(r), time.Minute, func() ([]byte, error) {
+	data, err := s.Cache.Get(rest.URLKey(r), 4*time.Hour, func() ([]byte, error) {
 		comments, e := s.DataService.Find(locator, sort)
 		if e != nil {
 			return nil, e
@@ -58,7 +58,7 @@ func (s *Rest) rssPostCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 func (s *Rest) rssSiteCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 	log.Printf("[DEBUG] get rss for site %s", r.URL.Query().Get("site"))
 
-	data, err := s.Cache.Get(rest.URLKey(r), time.Minute, func() ([]byte, error) {
+	data, err := s.Cache.Get(rest.URLKey(r), 4*time.Hour, func() ([]byte, error) {
 		comments, e := s.DataService.Last(r.URL.Query().Get("site"), maxRssItems)
 		if e != nil {
 			return nil, e