multiple warnings after xcache installation
 

Hello,

My host just installed XCache 1.2.2 on my server as eAccelerator isn't really supported well by vBulletin and vBSEO.

I've modified my config.php to
Code:
$config['Datastore']['class'] = 'vB_Datastore_XCache';
$config['Datastore']['prefix'] = 'forum';
But after uploading the config.php again I'm getting this as a result
Code:
Warning: xcache_isset() [function.xcache-isset]: xcache.var_size is either 0 or too small to enable var data caching in /home/vbstyles/public_html/includes/class_datastore.php on line 557
Warning: xcache_isset() [function.xcache-isset]: xcache.var_size is either 0 or too small to enable var data caching in /home/vbstyles/public_html/includes/class_datastore.php on line 557

lots more of these
Does someone know how to solve this perhaps?