diff --git a/web/yaamp/core/functions/memcache.php b/web/yaamp/core/functions/memcache.php
index 611e628..ff775b0 100644
--- a/web/yaamp/core/functions/memcache.php
+++ b/web/yaamp/core/functions/memcache.php
@@ -15,51 +15,60 @@ class YaampMemcache
 		return memcache_get($this->memcache, $key);
 	}
 
-	public function set($key, $value, $t=30)
+	public function set($key, $value, $t=30, $options=0)
 	{
-		memcache_set($this->memcache, $key, $value, 0, $t);
+		memcache_set($this->memcache, $key, $value, $options, $t);
 	}
 
 	////////////////////////////////////////////////////////////////
 
-	public function get_database_count($key, $query, $params=array())
-	{
-
-	}
-
-	public function get_database_scalar($key, $query, $params=array())
+	public function get_database_scalar($key, $query, $params=array(), $t=30)
 	{
 		$value = $this->get($key);
-		if($value === false)
-		{
+		if($value === false) {
 			$value = dboscalar($query, $params);
-			$this->set($key, $value);
+			$this->set($key, $value, $t);
 		}
-
 		return $value;
 	}
 
-	public function get_database_count_ex($key, $table, $query, $params=array())
+	public function get_database_column($key, $query, $params=array(), $t=30)
 	{
 		$value = $this->get($key);
-		if($value === false)
-		{
+		if($value === false) {
+			$value = dbocolumn($query, $params);
+			$this->set($key, $value, $t);
+		}
+		return $value;
+	}
+
+	public function get_database_count_ex($key, $table, $query, $params=array(), $t=30)
+	{
+		$value = $this->get($key);
+		if($value === false) {
 			$value = getdbocount($table, $query, $params);
-			$this->set($key, $value);
+			$this->set($key, $value, $t);
 		}
-
 		return $value;
 	}
 
-	public function get_database_row($key, $query, $params=array())
+	public function get_database_list($key, $query, $params=array(), $t=30)
 	{
 		$value = $this->get($key);
-		if($value === false)
-		{
-			$value = dborow($query, $params);
-			$this->set($key, $value);
+		if($value === false) {
+			$value = dbolist($query, $params);
+			$this->set($key, $value, $t, MEMCACHE_COMPRESSED);
 		}
+		return $value;
+	}
 
+	public function get_database_row($key, $query, $params=array(), $t=30)
+	{
+		$value = $this->get($key);
+		if($value === false) {
+			$value = dborow($query, $params);
+			$this->set($key, $value, $t);
+		}
 		return $value;
 	}
 
@@ -78,8 +87,6 @@ class YaampMemcache
 		$a[$name] = $count+1;
 		memcache_set($this->memcache, 'url-map', $a);
 	}
-};
-
-
+}
 
 
diff --git a/web/yaamp/modules/bench/devices.php b/web/yaamp/modules/bench/devices.php
index 4ddf8e0..5bc76d3 100644
--- a/web/yaamp/modules/bench/devices.php
+++ b/web/yaamp/modules/bench/devices.php
@@ -2,10 +2,21 @@
 
 include('functions.php');
 
+$client_ip = arraySafeVal($_SERVER,'REMOTE_ADDR');
+$whitelisted = isAdminIP($client_ip);
+if (!$whitelisted && is_file(YAAMP_LOGS.'/overloaded')) {
+	header('HTTP/1.0 503 Disabled, server overloaded');
+	return;
+}
+
 $this->pageTitle = "Devices";
 
 $chips = array();
-$in_db = dbolist("SELECT DISTINCT device, type, chip, idchip, vendorid FROM benchmarks WHERE idchip > 0 ORDER BY type DESC, device, vendorid");
+// todo: bench_devices table to cache that
+$in_db = $this->memcache->get_database_list("benchmarks-devices",
+	"SELECT DISTINCT device, type, chip, idchip, vendorid FROM benchmarks WHERE idchip > 0 ORDER BY type DESC, device, vendorid",
+	array(), 120
+);
 foreach ($in_db as $key => $row) {
 	$vendorid = $row['vendorid'];
 	$chip = $row['chip'];
@@ -42,7 +53,12 @@ Devices in database
 end;
 
 $algos_columns = '';
-$algos = dbocolumn("SELECT DISTINCT algo FROM benchmarks ORDER BY algo LIMIT 30");
+$month = time() - (30 * 24 * 3600);
+
+$algos = $this->memcache->get_database_column("benchmarks-algos",
+	"SELECT DISTINCT algo FROM benchmarks WHERE time > $month ORDER BY algo LIMIT 20",
+	array(), 120
+);
 foreach ($algos as $algo) {
 	$algos_columns .= '<th>'.$algo.'</th>';
 }
@@ -101,9 +117,10 @@ foreach ($in_db as $row) {
 		echo '<td>'.CHtml::link($row['vendorid'],'/bench?vid='.$row['vendorid']).'</td>';
 
 	if (!empty($vendorid))
-		$records = dbocolumn("SELECT algo FROM benchmarks WHERE vendorid=:vid ", array(':vid'=>$vendorid));
+		$records = dbocolumn("SELECT DISTINCT algo FROM benchmarks WHERE vendorid=:vid ", array(':vid'=>$vendorid));
 	else
-		$records = dbocolumn("SELECT algo FROM benchmarks WHERE device=:dev ", array(':dev'=>$row['device'])); // cpu
+		$records = dbocolumn("SELECT DISTINCT algo FROM benchmarks WHERE device=:dev ", array(':dev'=>$row['device'])); // cpu
+
 	foreach ($algos as $algo) {
 		$tick = '&nbsp;';
 		if (in_array($algo, $records)) {