diff --git a/app/Config/Schema/db_acl.php b/app/Config/Schema/db_acl.php
index 7ba826b04..290a066cd 100644
--- a/app/Config/Schema/db_acl.php
+++ b/app/Config/Schema/db_acl.php
@@ -56,7 +56,11 @@ class DbAclSchema extends CakeSchema {
 		'alias' => array('type' => 'string', 'null' => true),
 		'lft' => array('type' => 'integer', 'null' => true, 'default' => null, 'length' => 10),
 		'rght' => array('type' => 'integer', 'null' => true, 'default' => null, 'length' => 10),
-		'indexes' => array('PRIMARY' => array('column' => 'id', 'unique' => 1))
+		'indexes' => array(
+                    'PRIMARY' => array('column' => 'id', 'unique' => 1),
+                    'idx_acos_lft_rght' => array('column' => array('lft', 'rght'), 'unique' => 0),
+                    'idx_acos_alias' => array('column' => 'alias', 'unique' => 0)
+                )
 	);
 
 /**
@@ -70,7 +74,11 @@ class DbAclSchema extends CakeSchema {
 		'alias' => array('type' => 'string', 'null' => true),
 		'lft' => array('type' => 'integer', 'null' => true, 'default' => null, 'length' => 10),
 		'rght' => array('type' => 'integer', 'null' => true, 'default' => null, 'length' => 10),
-		'indexes' => array('PRIMARY' => array('column' => 'id', 'unique' => 1))
+		'indexes' => array(
+                    'PRIMARY' => array('column' => 'id','unique' => 1), 
+                    'idx_aros_lft_rght' => array('column' => array('lft', 'rght'), 'unique' => 0),
+                    'idx_aros_alias' => array('column' => 'alias', 'unique' => 0)
+                )
 	);
 
 /**
@@ -85,7 +93,11 @@ class DbAclSchema extends CakeSchema {
 		'_read' => array('type' => 'string', 'null' => false, 'default' => '0', 'length' => 2),
 		'_update' => array('type' => 'string', 'null' => false, 'default' => '0', 'length' => 2),
 		'_delete' => array('type' => 'string', 'null' => false, 'default' => '0', 'length' => 2),
-		'indexes' => array('PRIMARY' => array('column' => 'id', 'unique' => 1), 'ARO_ACO_KEY' => array('column' => array('aro_id', 'aco_id'), 'unique' => 1))
+		'indexes' => array(
+                    'PRIMARY' => array('column' => 'id', 'unique' => 1), 
+                    'ARO_ACO_KEY' => array('column' => array('aro_id', 'aco_id'), 'unique' => 1),
+                    'idx_aco_id' => array('column' => 'aco_id', 'unique' => 0)
+                )
 	);
 
 }
diff --git a/app/Config/Schema/db_acl.sql b/app/Config/Schema/db_acl.sql
index 274780e26..ece2ee125 100644
--- a/app/Config/Schema/db_acl.sql
+++ b/app/Config/Schema/db_acl.sql
@@ -38,4 +38,15 @@ CREATE TABLE aros (
   lft INTEGER(10) DEFAULT NULL,
   rght INTEGER(10) DEFAULT NULL,
   PRIMARY KEY  (id)
-);
\ No newline at end of file
+);
+
+/* this indexes will improve acl perfomance */
+CREATE INDEX idx_acos_lft_rght ON `acos` (`lft`, `rhgt`);
+
+CREATE INDEX idx_acos_alias ON `acos` (`alias`);
+
+CREATE INDEX idx_aros_lft_rght ON `aros` (`lft`, `rhgt`);
+
+CREATE INDEX idx_aros_alias ON `aros` (`alias`);
+
+CREATE INDEX idx_aco_id ON `aros_acos` (`aco_id`);
\ No newline at end of file
diff --git a/lib/Cake/Model/AclNode.php b/lib/Cake/Model/AclNode.php
index a565eb7a1..63c29f04d 100644
--- a/lib/Cake/Model/AclNode.php
+++ b/lib/Cake/Model/AclNode.php
@@ -89,6 +89,8 @@ class AclNode extends Model {
 				)),
 				'order' => $db->name("{$type}.lft") . ' DESC'
 			);
+                                
+                        $conditionsAfterJoin = array();
 
 			foreach ($path as $i => $alias) {
 				$j = $i - 1;
@@ -98,18 +100,23 @@ class AclNode extends Model {
 					'alias' => "{$type}{$i}",
 					'type' => 'INNER',
 					'conditions' => array(
-						$db->name("{$type}{$i}.lft") . ' > ' . $db->name("{$type}{$j}.lft"),
-						$db->name("{$type}{$i}.rght") . ' < ' . $db->name("{$type}{$j}.rght"),
-						$db->name("{$type}{$i}.alias") . ' = ' . $db->value($alias, 'string'),
-						$db->name("{$type}{$j}.id") . ' = ' . $db->name("{$type}{$i}.parent_id")
+						$db->name("{$type}{$i}.alias") . ' = ' . $db->value($alias, 'string')
 					)
 				);
+                                                
+                                // it will be better if this conditions will performs after join operation
+                                $conditionsAfterJoin[] = $db->name("{$type}{$j}.id") . ' = ' . $db->name("{$type}{$i}.parent_id");
+                                $conditionsAfterJoin[] = $db->name("{$type}{$i}.rght") . ' < ' . $db->name("{$type}{$j}.rght");
+                                $conditionsAfterJoin[] = $db->name("{$type}{$i}.lft") . ' > ' . $db->name("{$type}{$j}.lft");
 
 				$queryData['conditions'] = array('or' => array(
 					$db->name("{$type}.lft") . ' <= ' . $db->name("{$type}0.lft") . ' AND ' . $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}0.rght"),
 					$db->name("{$type}.lft") . ' <= ' . $db->name("{$type}{$i}.lft") . ' AND ' . $db->name("{$type}.rght") . ' >= ' . $db->name("{$type}{$i}.rght"))
 				);
 			}
+                        
+                        $queryData['conditions'] = array_merge($queryData['conditions'], $conditionsAfterJoin);
+                        
 			$result = $db->read($this, $queryData, -1);
 			$path = array_values($path);