Understanding Webmin CPU statistics
Posted on 2011-10-12
One of my customers has a dynamically generated "slide show" of tables and graphs created from the web application's data.
The application runs on Ubuntu, Apache, MySql, and PHP.
The slide show is sometimes timing out ... the browser bringing up its own "this web page is taking too long" message.
I load tested this morning and webmin shows the CPU numbers higher than usual. But what do these numbers mean?
CPU load averages 1.24 (1 min) 0.90 (5 mins) 0.53 (15 mins)
Is that 1.24% of CPU capability? Or 124%?
CPU usage 66% user, 1% kernel, 0% IO, 33% idle
What's User CPU? Would that be Apache? MySql?
What IO? Are we saying that Disk access is not a significant factor ... or something else?