Allowed memory size of 805306368 bytes exhausted (no replies)

Hello,

I get the following error from cron job:
ERROR CoreConsole[2014-06-24 21:15:14] [d5d06] Got invalid response from API request: http://piwik.glodek-edv.de/index.php?module=API&method=API.get&idSite=6&period=week&date=last3&format=php&token_auth=129ffa079f7e0600c0571efb0c75eacc&trigger=archivephp. Response was 'PHP Fatal error: Allowed memory size of 805306368 bytes exhausted (tried to allocate 35 bytes) in /var/www/vhosts/glodek-edv.de/subdomains/piwik/httpdocs/core/DataTable.php on line 897 '

Memory_limit in php.ini is shown as 2048M by calling phpinfo()

Piwik-Version is 2.3.0

Any solution?

Thanks,
Siegbert