[TYPO3-dev] TYPO3 Installation extremely unstable - APC Cache Configuration

[Philipp Wrann]

Hey,

i cant find the reason why my TYPO3 Installation is so unstable, it allways throws exceptions which is really annoying.
The Exception is

 #1232986877: Could not set value. (More information)

It has to do with the APC backend.

My Cacheconfig is as follows (located in AdditionalConfiguration.php):

$pagecache = $systemcache = array(
	'backend' => 'TYPO3\\CMS\\Core\\Cache\\Backend\\ApcBackend',
	'frontend' => 'TYPO3\\CMS\\Core\\Cache\\Frontend\\VariableFrontend',
	'options' => array('defaultLifetime' => 0)
);

$pagecache['options']['defaultLifetime'] = 21600;
$pagecache['groups'] = array('pages','all');
$systemcache['groups'] = array('system');
$systemcache['options']['defaultLifetime'] = 0;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_pages'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_pagesection'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_hash'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_rootline'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['fluidchunks'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['pidlist'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['subtypes'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['news_categorycache'] = $pagecache;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_object'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_reflection'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_datamapfactory_datamap'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_typo3dbbackend_tablecolumns'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['generatedflex'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['l10n'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_typo3dbbackend_queries'] = $systemcache;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_core']['backend'] = 'TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend';
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['class_cache']['backend'] = 'TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend';
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['class_cache']['frontend'] = 'TYPO3\\CMS\\Core\\Cache\\Frontend\\PhpFrontend';

I reported a related issue here:
https://forge.typo3.org/issues/61670#change-230224

TSConfig for users:
options.clearCache.pages = 1
options.clearCache.all = 1

Do you see a problem in my Configuration? I cant find one but as i said - the site is extremely unstable.