I have Memcache enabled both on Drupal and the server... It seems to be configured fine on the server-end (both by port & Settings.php).
If am being accurate, PSI grades even went up in about 4-5 points... So seemingly my site does use Memcache... And yet, Cron gives a strange error:
PECL Memcache version 2.2.5 is unsupported. Please update to 3.0.6 or newer.
Tried to Google the error (or part of it) and found just nothing... I've also spoke with the server's support team and one of them told me to ignore this error... I'm not sure if this is the right thing to do... Will glad for the advice of Veteran drupal developers...