Extremely slow speed on my site using codeignitor... is this normal?

[eluser]alitech[/eluser]
here is what my hosting guys say regarding the Mysql query caching

Hello Ali,

Yes, Mysql query cache is already enabled

---
root@ignito [~]# hostname
ignito.123vouchercodes.co.uk
root@ignito [~]# grep query_cache /etc/my.cnf
query_cache_size= 16M
root@ignito [~]#
---

Regards,