Reset prometheus summaries for more accurate percentiles per 5 minutes

src/database.js

@@ -19,6 +19,10 @@ const queryCount = new Counter({
     help: 'DB query count'
 });
 
+setInterval(() => {
+    queryLatency.reset();
+}, 5 * 60 * 1000).unref();
+
 let db = null;
 let globalBanDB = null;
 

src/web/webserver.js

@@ -58,6 +58,10 @@ function initPrometheus(app) {
         });
         next();
     });
+
+    setInterval(() => {
+        latency.reset();
+    }, 5 * 60 * 1000).unref();
 }
 
 /**