Upgrade is it possible to limit cpu usage per website ?

I hear your problem, not exactly sure how you'd limit the CPU usage per site unless you were using cPanel or software where you could limit each account. Regardless of what you do, you're still going to have sites go down if they are using 100% of their allotted CPU. Maybe someone else has a method for doing this in Centmin Mod and can help you.

Don't take this the wrong way, but I don't understand people's logic in having a super cheap server running multiple sites. You have 8 sites, you don't make $10 a month on all those sites... enough to pay for a $10 server? You'd rather spend time trying to figure out how you can stretch out a 2.49 server's CPU usage? The amount of time you spent trying to figure this out or even typing this thread cost you more than 2.49 in time.

Take a look at lowendbox.com, there are always deals on there for VPS which have more than the Hetzner 2.49 VPS.

Here is an example: The NYC Launch Sale, from SSD Nodes

At ssdnodes you can get a server with 16GB of RAM and multiple CPUs for $6.53 a month or $79 a year. They are in NYC, but they just had the same deal for EU. For $4 more you 8x your RAM and 4x your CPU.

One thing you can never buy... more of your time. Just spend a little more and upgrade to a little bit better server. Then you won't have to worry about this.

was penny-wise and pound-foolish

Hope everything works out for you.

 

If you have a lot of non-profit sites, set up a gofundme account and collect donations to pay for the server. You shouldn't have a hard time getting the amount you need for the server. Just put a link to your gofundme on each of the websites. People love giving money to help non-profits. Since you only need a little bit of money, it shouldn't be that hard to raise $10 a month.