change sqlite to WAL mode

server/database.js

@@ -17,6 +17,7 @@ class Database {
 
         if (! this.sqliteInstance) {
             this.sqliteInstance = new sqlite3.Database(Database.path);
+            this.sqliteInstance.run("PRAGMA journal_mode = WAL");
         }
 
         const Dialect = require("knex/lib/dialects/sqlite3/index.js");

server/server.js

@@ -646,9 +646,9 @@ async function afterLogin(socket, user) {
     // For example, query the edit data first.
     setTimeout(async () => {
         for (let monitorID in monitorList) {
-            await sendHeartbeatList(socket, monitorID);
-            await sendImportantHeartbeatList(socket, monitorID);
-            await Monitor.sendStats(io, monitorID, user.id)
+            sendHeartbeatList(socket, monitorID);
+            sendImportantHeartbeatList(socket, monitorID);
+            Monitor.sendStats(io, monitorID, user.id)
         }
     }, 500);
 }