diff --git a/framework/yii/debug/LogTarget.php b/framework/yii/debug/LogTarget.php
index b2081be..71478ce 100644
--- a/framework/yii/debug/LogTarget.php
+++ b/framework/yii/debug/LogTarget.php
@@ -20,12 +20,14 @@ class LogTarget extends Target
 	 * @var Module
 	 */
 	public $module;
-	public $maxLogFiles = 20;
+	public $tag;
+	public $historySize = 20;
 
 	public function __construct($module, $config = array())
 	{
 		parent::__construct($config);
 		$this->module = $module;
+		$this->tag = date('Ymd-His', microtime(true));
 	}
 
 	/**
@@ -38,8 +40,7 @@ class LogTarget extends Target
 		if (!is_dir($path)) {
 			mkdir($path);
 		}
-		$tag = Yii::$app->getLog()->getTag();
-		$file = "$path/$tag.log";
+		$file = "$path/{$this->tag}.log";
 		$data = array();
 		foreach ($this->module->panels as $panel) {
 			$data[$panel->id] = $panel->save();
@@ -78,8 +79,8 @@ class LogTarget extends Target
 			}
 		}
 		sort($files);
-		if (count($files) > $this->maxLogFiles) {
-			$n = count($files) - $this->maxLogFiles;
+		if (count($files) > $this->historySize) {
+			$n = count($files) - $this->historySize;
 			foreach ($files as $i => $file) {
 				if ($i < $n) {
 					unlink($file);
diff --git a/framework/yii/debug/Module.php b/framework/yii/debug/Module.php
index 2b20cc1..c084fad 100644
--- a/framework/yii/debug/Module.php
+++ b/framework/yii/debug/Module.php
@@ -63,8 +63,9 @@ class Module extends \yii\base\Module
 	{
 		/** @var View $view */
 		$id = 'yii-debug-toolbar';
+		$tag = Yii::$app->getLog()->targets['debug']->tag;
 		$url = Yii::$app->getUrlManager()->createUrl('debug/default/toolbar', array(
-			'tag' => Yii::$app->getLog()->getTag(),
+			'tag' => $tag,
 		));
 		$view = $event->sender;
 		$view->registerJs("yii.debug.load('$id', '$url');");
diff --git a/framework/yii/debug/controllers/DefaultController.php b/framework/yii/debug/controllers/DefaultController.php
index a80201b..b63bc4b 100644
--- a/framework/yii/debug/controllers/DefaultController.php
+++ b/framework/yii/debug/controllers/DefaultController.php
@@ -40,6 +40,7 @@ class DefaultController extends Controller
 	{
 		$this->loadData($tag);
 		return $this->renderPartial('toolbar', array(
+			'tag' => $tag,
 			'panels' => $this->module->panels,
 		));
 	}
diff --git a/framework/yii/debug/panels/ConfigPanel.php b/framework/yii/debug/panels/ConfigPanel.php
index e513caf..9e19c90 100644
--- a/framework/yii/debug/panels/ConfigPanel.php
+++ b/framework/yii/debug/panels/ConfigPanel.php
@@ -24,12 +24,10 @@ class ConfigPanel extends Panel
 
 	public function getSummary()
 	{
-		$link = Html::a('more details', array('index', 'tag' => $this->data['tag']));
 		return <<<EOD
 <div class="yii-debug-toolbar-block">
 	PHP: {$this->data['phpVersion']},
-	Yii: {$this->data['phpVersion']},
-	$link
+	Yii: {$this->data['phpVersion']}
 </div>
 EOD;
 	}
@@ -42,7 +40,6 @@ EOD;
 	public function save()
 	{
 		return array(
-			'tag' => Yii::$app->getLog()->getTag(),
 			'phpVersion' => PHP_VERSION,
 			'yiiVersion' => Yii::getVersion(),
 		);
diff --git a/framework/yii/debug/views/default/toolbar.php b/framework/yii/debug/views/default/toolbar.php
index a7958fe..10f66a5 100644
--- a/framework/yii/debug/views/default/toolbar.php
+++ b/framework/yii/debug/views/default/toolbar.php
@@ -2,7 +2,9 @@
 /**
  * @var \yii\base\View $this
  * @var \yii\debug\Panel[] $panels
+ * @var string $tag
  */
+use yii\helpers\Html;
 ?>
 <style>
 #yii-debug-toolbar {
@@ -28,4 +30,7 @@
 	<?php foreach ($panels as $panel): ?>
 	<?php echo $panel->getSummary(); ?>
 	<?php endforeach; ?>
+	<div class="yii-debug-toolbar-block">
+		<?php echo Html::a('more details', array('index', 'tag' => $tag)); ?>
+	</div>
 </div>
diff --git a/framework/yii/log/Logger.php b/framework/yii/log/Logger.php
index d3d99c3..abe6d8b 100644
--- a/framework/yii/log/Logger.php
+++ b/framework/yii/log/Logger.php
@@ -129,13 +129,6 @@ class Logger extends Component
 	 */
 	public $targets = array();
 
-
-	/**
-	 * @var string
-	 */
-	private $_tag;
-
-
 	/**
 	 * Initializes the logger by registering [[flush()]] as a shutdown function.
 	 */
@@ -197,25 +190,6 @@ class Logger extends Component
 	}
 
 	/**
-	 * @return string a tag that uniquely identifies the current request.
-	 */
-	public function getTag()
-	{
-		if ($this->_tag === null) {
-			$this->_tag = date('Ymd-His', microtime(true));
-		}
-		return $this->_tag;
-	}
-
-	/**
-	 * @param string $tag a tag that uniquely identifies the current request.
-	 */
-	public function setTag($tag)
-	{
-		$this->_tag = $tag;
-	}
-
-	/**
 	 * Returns the total elapsed time since the start of the current request.
 	 * This method calculates the difference between now and the timestamp
 	 * defined by constant `YII_BEGIN_TIME` which is evaluated at the beginning