[NiteWave]

I haven't activated Litespeed on port 80 yet as I'm trying to get Xcache working with Apache first so I know what works before I move everything to litespeed.

please try litespeed directly. there is free 2-CPU trial license working for 15 days, we can extend the trial period with another 15 days per your request, total 30 days should be enough to test.

When I activate Xcache 3.0.1 however Apache FCGI processes seem to crash quite often, I can't login to the admin page, and I don't get any impression that anything is being accelerated.

Does XCache work with Suexec ? I've read advice here from a few years ago saying that it wasn't compatible (this was XCache 1.3 and older versions of Litespeed). Should I work correctly with the current versions of Litespeed ?

in shared hosting, for opcode cache, only eAccelerator(use disk instead of memory as opcode storage) is recommended before, for apache,cPanel or litespeed.

php suEXEC daemon is quite new and introduced in September,2012:
http://blog.litespeedtech.com/2012/0...c-daemon-mode/
it's working only with litespeed, not with apache. with this mode, APC and Xcache is practically possible in shared hosting. and by the discussion in recent days, only xcache at present is practically possible to work with php suEXEC daemon mode(enable opcode cache and variable cache in memory for each user and users can't access each other)

if not in shared hosting environment(which may have thousands of different user accounts), all php scripts are running under one user or several known users, APC or XCache has been working well and popular for years until now.