Тормозит сайт: как убрать сессии из фронтэнда? - Joomla 1.5: Настройка и оптимизация

SELECT * 
  FROM jos_session 
  WHERE session_id = '317b0b841379321cf27e33583226efbe'
  
DELETE 
  FROM jos_session 
  WHERE ( time < '1264465390' )
  
SELECT * 
  FROM jos_session 
  WHERE session_id = '317b0b841379321cf27e33583226efbe'
  
UPDATE `jos_session` 
  SET `time`='1264466290',`userid`='0',`usertype`='',`username`='',`gid`='0',`guest`='1',`client_id`='0',`data`='__default|a:7:
{s:22:\"session.client.browser\";s:62:\"Opera/9.80 (Windows NT 5.1; U; ru) Presto/2.2.15 Version/10.10\";s:15:\"session.counter
\";i:8;s:8:\"registry\";O:9:\"JRegistry\":3:{s:17:\"_defaultNameSpace\";s:7:\"session\";s:9:\"_registry\";a:1:{s:7:\"session\";a:1:
{s:4:\"data\";O:8:\"stdClass\":0:{}}}s:7:\"_errors\";a:0:{}}s:4:\"user\";O:5:\"JUser\":19:{s:2:\"id\";i:0;s:4:\"name\";N;s:8:
\"username\";N;s:5:\"email\";N;s:8:\"password\";N;s:14:\"password_clear\";s:0:\"\";s:8:\"usertype\";N;s:5:\"block\";N;s:9:
\"sendEmail\";i:0;s:3:\"gid\";i:0;s:12:\"registerDate\";N;s:13:\"lastvisitDate\";N;s:10:\"activation\";N;s:6:\"params\";N;s:3:\"aid
\";i:0;s:5:\"guest\";i:1;s:7:\"_params\";O:10:\"JParameter\":7:{s:4:\"_raw\";s:0:\"\";s:4:\"_xml\";N;s:9:\"_elements\";a:0:
{}s:12:\"_elementPath\";a:1:{i:0;s:67:\"/frtg/xghj123456/mysiteru/www/libraries/joomla/html/parameter/element\";}s:17:
\"_defaultNameSpace\";s:8:\"_default\";s:9:\"_registry\";a:1:{s:8:\"_default\";a:1:{s:4:\"data\";O:8:\"stdClass\":0:{}}}s:7:
\"_errors\";a:0:{}}s:9:\"_errorMsg\";N;s:7:\"_errors\";a:0:{}}s:19:\"session.timer.start\";i:1264465455;s:18:\"session.timer.last
\";i:1264466176;s:17:\"session.timer.now\";i:1264466177;}' 
  WHERE session_id='317b0b841379321cf27e33583226efbe'