: Analyze high load due to Joomla? I have a Joomla site causing very high (php) load on the server. I have already ran the MySQL slow log feature and it doesn't appear to be MySQL. What are

@Shanna517

It's still going to be hard diagnosing the problem without disabling suspected components (diagnosing performance problems is like diagnosing any other sort of problem; it's a process of elimination, which requires isolating/controlling different variables to test different hypotheses), but useful tools to have are:


Monitoring / visualization tools: e.g. dstat + gnuplot, log analyzers, etc.
Stress/load testing tools: e.g. httperf, Autobench, ApacheBench (ab), OpenWebLoad, etc.
Code profiling tools: e.g. Dbg, Xdebug, CodeAnalyst, Dtrace, pmp, or whatever profiling tools come with your app framework's debugging facilities.
Other: Aspera is basically a MySQL performance diagnostic toolkit used by Percona, but a lot of these tools have more general purpose usefulness, such as tools for profiling IO, for stack traces, for triggering a script or event when certain conditions are met, for drilling down collected data, etc. It provides a lot of the "glue" for an efficient diagnostic workflow.

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