SQLSTATE[HY000]: General error: 1021 Disk full (/tmp/#sql_1_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device"), query was: DESCRIBE `log_visitor_info`

#0 /app/htdocs/lib/Varien/Db/Statement/Pdo/Mysql.php(97): Zend_Db_Statement_Pdo->_execute(Array)
#1 /app/htdocs/app/code/core/Zend/Db/Statement.php(291): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
#2 /app/htdocs/lib/Zend/Db/Adapter/Abstract.php(480): Zend_Db_Statement->execute(Array)
#3 /app/htdocs/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('DESCRIBE `log_v...', Array)
#4 /app/htdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(486): Zend_Db_Adapter_Pdo_Abstract->query('DESCRIBE `log_v...', Array)
#5 /app/htdocs/lib/Zend/Db/Adapter/Pdo/Mysql.php(171): Varien_Db_Adapter_Pdo_Mysql->query('DESCRIBE `log_v...')
#6 /app/htdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(1734): Zend_Db_Adapter_Pdo_Mysql->describeTable('log_visitor_inf...', NULL)
#7 /app/htdocs/app/code/core/Mage/Core/Model/Resource/Abstract.php(199): Varien_Db_Adapter_Pdo_Mysql->describeTable('log_visitor_inf...')
#8 /app/htdocs/app/code/core/Mage/Log/Model/Resource/Visitor.php(187): Mage_Core_Model_Resource_Abstract->_prepareDataForTable(Object(Varien_Object), 'log_visitor_inf...')
#9 /app/htdocs/app/code/core/Mage/Log/Model/Resource/Visitor.php(115): Mage_Log_Model_Resource_Visitor->_saveVisitorInfo(Object(Mage_Log_Model_Visitor))
#10 /app/htdocs/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(468): Mage_Log_Model_Resource_Visitor->_afterSave(Object(Mage_Log_Model_Visitor))
#11 /app/htdocs/app/code/core/Mage/Core/Model/Abstract.php(379): Mage_Core_Model_Resource_Db_Abstract->save(Object(Mage_Log_Model_Visitor))
#12 /app/htdocs/app/code/core/Mage/Log/Model/Visitor.php(223): Mage_Core_Model_Abstract->save()
#13 /app/htdocs/app/code/core/Mage/Core/Model/App.php(1441): Mage_Log_Model_Visitor->initByRequest(Object(Varien_Event_Observer))
#14 /app/htdocs/app/code/core/Mage/Core/Model/App.php(1419): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Log_Model_Visitor), 'initByRequest', Object(Varien_Event_Observer), 'log')
#15 /app/htdocs/app/Mage.php(509): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#16 /app/htdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(527): Mage::dispatchEvent('controller_acti...', Array)
#17 /app/htdocs/app/code/core/Mage/Core/Controller/Front/Action.php(57): Mage_Core_Controller_Varien_Action->preDispatch()
#18 /app/htdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(410): Mage_Core_Controller_Front_Action->preDispatch()
#19 /app/htdocs/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(255): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#20 /app/htdocs/app/code/core/Mage/Core/Controller/Varien/Front.php(181): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#21 /app/htdocs/app/code/core/Mage/Core/Model/App.php(358): Mage_Core_Controller_Varien_Front->dispatch()
#22 /app/htdocs/app/Mage.php(743): Mage_Core_Model_App->run(Array)
#23 /app/htdocs/index.php(60): Mage::run('', 'store')
#24 {main}

Fatal error:  Uncaught Exception: Warning: Unknown: write failed: No space left on device (28)  in Unknown on line 0 in /app/htdocs/app/code/core/Mage/Core/functions.php:184
Stack trace:
#0 [internal function]: mageCoreErrorHandler(2, 'Unknown: write ...', 'Unknown', 0, NULL)
#1 {main}
  thrown in /app/htdocs/app/code/core/Mage/Core/functions.php on line 184