diff --git a/lxd/api_metrics.go b/lxd/api_metrics.go
index <HASH>..<HASH> 100644
--- a/lxd/api_metrics.go
+++ b/lxd/api_metrics.go
@@ -182,7 +182,7 @@ func metricsGet(d *Daemon, r *http.Request) response.Response {
 
 	for project, entries := range newMetrics {
 		metricsCache[project] = metricsCacheEntry{
-			expiry:  time.Now().Add(15 * time.Second),
+			expiry:  time.Now().Add(8 * time.Second),
 			metrics: entries,
 		}
lxd/metrics: Reduce cache to 8s to accomodate <I>s intervals

Closes #<I>