What is the best configuration for a single site?

[espeacke]

Hello.
Currently I have a dedicated server for a single web, working fine.

But ..

When it reaches 300 users online (sometimes less) the site is slow.

I see that cloudlinux is for servers with shared hostings and I have only one site on this server, install cloudlinux to prevent server down.

What is the best configuration for a single site?
Sorry my english.

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Vendor: GenuineIntel
Name: Intel(R) Xeon(R) CPU X3450 @ 2.67GHz
Speed: 2666.751 MHz
Cache: 8192 KB
8 CPUs
8Gb Ram
what else I can put?
i can put mi URL?
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Greetings and Thanks.

[iseletsk]

Carlos,

There is no benefit in running CloudLinux on a server with single site.
The way CL works -- it limits the offending site, letting all other sites on the server to continue working.
In your case -- it would limit the one and only site on the server.