xcache.var_size = 4M or 8M is fine

Don't have to be the same size.

Why not use memcahce instead?

hydn, is it possible for xcache and memcached to co-exist? If I have xcache installed as an oppcache, how should I install memcached?

Yes. It is. operation code and variable cache are two different things. If your database and web server are on the same box I would recommend you use xcache for opcode & datastore. If on separate boxes then use memcache for datastore of vb install on database server and xcache will run as usual on web server.

hope that helps.

Ok, thank you. My database and web server are on the same box, so I'll continue to use xcache for opcode & datastore.

One more question - Is it better to make xcache.so in xcache.ini installed as a zend_extension or php extension?

In IIS zend conflicted with xcache for me. If it works for you use it. But not necessary. If you do use it benchmark because i'm not sure it will make things faster with xcache.

xcache installed in the server and i applied all changes

still getting the error above
any help please

Thanks working fine on Cent OS with Lxadmin, lighttpd...

Though no benchmarks done yet.

3.7 anyone?

You don't need this plug-in in 3.7 because 3.7 already have this. You just have to enable it in your config.php under the ****** DATASTORE CACHE CONFIGURATION ***** option. Just type $config['Datastore']['class'] = 'vB_Datastore_XCache'; & save it.

and it works ? forums are really faster ?