OOM command not allowed when used memory > 'maxmemory'.

#0 /var/www/www_live/releases/20191111224340/lib/Credis/Client.php(825): Credis_Client->read_reply('hincrby')
#1 /var/www/www_live/releases/20191111224340/app/code/community/Cm/RedisSession/Model/Session.php(216): Credis_Client->__call('hincrby', Array)
#2 [internal function]: Cm_RedisSession_Model_Session->read('sess_397e9e9cp7...')
#3 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php(134): session_start()
#4 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/Session/Abstract/Varien.php(228): Mage_Core_Model_Session_Abstract_Varien->start('frontend')
#5 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/Session/Abstract.php(84): Mage_Core_Model_Session_Abstract_Varien->init('core', 'frontend')
#6 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/Session.php(42): Mage_Core_Model_Session_Abstract->init('core', 'frontend')
#7 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/Config.php(1357): Mage_Core_Model_Session->__construct(Array)
#8 /var/www/www_live/releases/20191111224340/app/Mage.php(470): Mage_Core_Model_Config->getModelInstance('core/session', Array)
#9 /var/www/www_live/releases/20191111224340/app/Mage.php(484): Mage::getModel('core/session', Array)
#10 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Controller/Varien/Action.php(493): Mage::getSingleton('core/session', Array)
#11 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Controller/Front/Action.php(69): Mage_Core_Controller_Varien_Action->preDispatch()
#12 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Controller/Varien/Action.php(407): Mage_Core_Controller_Front_Action->preDispatch()
#13 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('view')
#14 /var/www/www_live/releases/20191111224340/app/code/local/Mage/Core/Controller/Varien/Front.php(200): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#15 /var/www/www_live/releases/20191111224340/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#16 /var/www/www_live/releases/20191111224340/app/Mage.php(690): Mage_Core_Model_App->run(Array)
#17 /var/www/www_live/releases/20191111224340/index.php(84): Mage::run('', 'store')
#18 {main}