Hi,

I have a dedicated RedHat 7.2 web server from which I serve about half a dozen web sites (all PHP based).

How do I monitor processor usage? The performance of all sites is great at the moment, but how do I work out how many sites I can add before I start to have performance issues?

I have looked at "MON" but it looks much more complicated that what I need - I don't need to monitor the network, for example, my host has much more bandwidth than I'll ever need. It's the processor, or disc access, that would be the limiting factor.

Cheers

You can see what your CPU stats are using top or the quite nice but rather fat gtop if you have X available.

If you do start getting CPU issues and most of your sites are using PHP then you may want to look into purchasing the Zend Cache to speed things up. The Zend Optimizer is available for free which could help a little too.

cheers

Jamie...

Sounds like you want to trend your processor usage... I'd recommend using Cacti. A standard installation includes graphs for the machine it gets installed on. You can also monitor additional machines if you want/need to. I have it running here at a client site. We monitor processors, memory, drive/volume usage, network traffic, citrix connections, groupwise connections, and webmail connections on a dozen Win2k/NT and a dozen Netware machines... and of course the server doing all this is Linux with a set of graphs for itself

Thanks Jamie, thanks Burke.

Cacti looks really neat. I will install it on my test server and if it looks like it's going to work I'll move it onto my production server.