continued (post was too long !) ...
The next block of settings allow you to monitor and be advised of excessive load averages...
PT_LOAD I have set to 30, this may be a bit much for you, so consider
60 instead.
PT_LOAD_AVG I have set to
5, I don't see many excessive CPU usage issues so this is a reasonable setting for me. If you see the CPU usage rising high frequently when looking at the service status page, then you may want to consider temporarily reduing this to say 3 so that you can track the excessive usage better (there may be a trade off to this, such as higher resource usage by LFD, so use carefully).
PT_LOAD_LEVEL I have set to
6 and
PT_LOAD_SKIP I have set to 600. These settings will mean that you get a detailed email showing all processes and resource usage if the load averages are exceeded, very handy in finding out what is chewing up those valuable resources.
I have found these settings to be perfect for my setup, but you should be aware that it
may result in higher resource usage, although it will certainly allow you to have greater control over what resources are being used up and by whom. Also, CSF/LFD will block that excessive usage. There are probably very good bits of advice from others to compliment what I've suggested.
There should be other things you should do to preserve resource usage and the security of your
VPS Hosting, such as mod_security, mod_evasive and DDOS. Mod-security can tie in with LFD and block IP addresses who trigger filters. I am personally very short on time right now so we'll have to get into those later, but they really can help reduce the load
As an example, in my case mod_security alone filters out around 10,000 bad requests, attempts to exploit scripts and spam forms/forums per month.
Please update to v11 and roll back Exim configuration to default, then set your own settings in its standard editor. I am running the release version of v11 and have absolutely no issues whatsoever.
sorry for any typos.
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