I used to run an IPB at BuyVM (I understand that's where vpsboard is).
vpsboard is sometimes slow...here is what I did to make my IPB fast:
1. Use nginx & php-fpm
2. Use APC (and tell IPB you're using APC)
3. Tuned the heck out of MySQL. Particularly MyISAM read parameters. Give MySQL a lot of memory to use.
4. Pre-compress images (though it doesn't look like vpsboard's theme is very image-intensive)
5. Turn off a lot of stuff that isn't needed...e.g., bind, xinetd, etc. That's so you can run more php-fpm workers and give MySQL more memory
vpsboard is sometimes slow...here is what I did to make my IPB fast:
1. Use nginx & php-fpm
2. Use APC (and tell IPB you're using APC)
3. Tuned the heck out of MySQL. Particularly MyISAM read parameters. Give MySQL a lot of memory to use.
4. Pre-compress images (though it doesn't look like vpsboard's theme is very image-intensive)
5. Turn off a lot of stuff that isn't needed...e.g., bind, xinetd, etc. That's so you can run more php-fpm workers and give MySQL more memory