closes #6883

install/data/defaults.json

@@ -111,5 +111,6 @@
     "hsts-preload": 0,
     "hsts-enabled": 0,
     "eventLoopLagThreshold": 100,
-    "eventLoopInterval": 500
+    "eventLoopInterval": 500,
+    "onlineCutoff": 30
 }

public/language/en-GB/admin/settings/user.json

@@ -27,6 +27,8 @@
 	"lockout-duration": "Account Lockout Duration (minutes)",
 	"login-days": "Days to remember user login sessions",
 	"password-expiry-days": "Force password reset after a set number of days",
+	"online-cutoff": "Minutes after user is considered inactive",
+	"online-cutoff-help": "If user performs no actions for this duration, they are considered inactive and they do not receive realtime updates.",
 	"registration": "User Registration",
 	"registration-type": "Registration Type",
 	"registration-type.normal": "Normal",

src/user/index.js

@@ -43,7 +43,7 @@ User.getUidsFromSet = function (set, start, stop, callback) {
 	if (set === 'users:online') {
 		var count = parseInt(stop, 10) === -1 ? stop : stop - start + 1;
 		var now = Date.now();
-		db.getSortedSetRevRangeByScore(set, start, count, '+inf', now - 300000, callback);
+		db.getSortedSetRevRangeByScore(set, start, count, '+inf', now - (meta.config.onlineCutoff * 60000), callback);
 	} else {
 		db.getSortedSetRevRange(set, start, stop, callback);
 	}

src/views/admin/settings/user.tpl

@@ -144,6 +144,9 @@
 				<input type="text" class="form-control" data-field="loginSeconds" placeholder="Seconds" />
 				<p class="help-block">Note that only one of these values will be used. If there is no <i>seconds</i> value we fall back to <i>days</i>. If
 					there is no <i>days</i> value we default to <i>14 days</i>.</p>
+				<label>[[admin/settings/user:online-cutoff]]</label>
+				<input type="text" class="form-control" data-field="onlineCutoff">
+				<p class="help-block">[[admin/settings/user:online-cutoff-help]]</p>
 			</div>
 		</form>
 	</div>