1.
File: 'app/code/core/Enterprise/PageCache/Model/Processor.php'
const XML_PATH_CACHE_MAX_SIZE = 'system/page_cache/max_cache_size';
Method: public function processRequestResponse(Zend_Controller_Request_Http $request, Zend_Controller_Response_Http $response)
$maxSizeInBytes = Mage::getStoreConfig(self::XML_PATH_CACHE_MAX_SIZE) * 1024 * 1024;
if ($currentStorageSize >= $maxSizeInBytes) {
Mage::app()->getCacheInstance()->invalidateType('full_page');
return $this;
}
By default 'max_cache_size' = 1Gb.
2. Magento 1.7 CE and 1.12 EE has a bug.
'cache_lifetime' option in 'cache.xml' is not used by Magento. It means that if something was cached it won't be rendered whenever.
There is a way how to fix it.
Create your module.
Rewrite the class 'Enterprise_PageCache_Model_Config'.
This is an example of 'etc/config.xml' file for your module.
<global>
<models>
<you_entpagecache>
<class>YOU_EnterprisePageCache_Model</class>
</you_entpagecache>
<enterprise_pagecache>
<rewrite>
<config>YOU_EnterprisePageCache_Model_Config</config>
</rewrite>
</enterprise_pagecache>
</models>
</global>
This is a new class 'YOU_EnterprisePageCache_Model_Config' without the bug.
class YOU_EnterprisePageCache_Model_Config extends Enterprise_PageCache_Model_Config
{
/**
* Create placeholder object based on block information
*
* @param Mage_Core_Block_Abstract $block
* @return Enterprise_PageCache_Model_Container_Placeholder
*/
public function getBlockPlaceholder($block)
{
$this->_initPlaceholders();
$type = $block->getType();
if (isset($this->_placeholders[$type])) {
$placeholderData = false;
foreach ($this->_placeholders[$type] as $placeholderInfo) {
if (!empty($placeholderInfo['name'])) {
if ($placeholderInfo['name'] == $block->getNameInLayout()) {
$placeholderData = $placeholderInfo;
}
} else {
$placeholderData = $placeholderInfo;
}
}
if (!$placeholderData) {
return false;
}
$placeholder = $placeholderData['code']
. ' container="' . $placeholderData['container'] . '"'
. ' block="' . get_class($block) . '"';
$placeholder.= ' cache_id="' . $block->getCacheKey() . '"';
foreach ($block->getCacheKeyInfo() as $k => $v) {
if (is_string($k) && !empty($k)) {
$placeholder .= ' ' . $k . '="' . $v . '"';
}
}
// Fixed bug -- 'cache_lifetime' is not used for checking that block should be rendered because it is expired.
$placeholder .= ' cache_lifetime="' . $placeholderData['cache_lifetime'] . '"';
$placeholder = Mage::getModel('enterprise_pagecache/container_placeholder', $placeholder);
return $placeholder;
}
return false;
}
}
