Accuwebhosting on "Strange WP-DB Fatal error - No sollution yey"

Hello Konstantinos,

1) Determine the path of loaded php.ini file by uploading the phpinfo.php and increase the PHP memory limit to that particular file.

2) Since you are receiving this error intermittently there's strong possibility of your VPS is running out of memory.So when you face this error, immediately check the server load. Try upgrading RAM of your VM if possible.

Hope that helps.