Hello ! We have the following LAMP-stack
Linux: Debian 7.10
PHP: PHP Version 5.4.45-0+deb7u2
HW is fairly new. (HP Proliant 320e Gen8, v2). Not brand new, but not old. We have 4GB RAM.
From time to time we have a load-average of around 100. (average: 2-4 weeks, but no time-pattern behind it)
The server ist completely unresponsible. Not even login is possible anymore in most cases.
If sometimes possible, I login and stop Apache. When I start again, everything works fine.
The whole restart-process takes about 20-30 minutes.
The server is running a Joomla driven website.
There are no traces at all in the logfiles (/var/log/messages, apache/php logfile, mysql-logfile).
We are running linux-scripts right now doing ps aux to a special log-file to get s.th. any further.
But in general. These kind of errors are torturing me, since you don't have the possibility
to identify the problematic php-script in a moderate time-frame. I would love to have a tool to identify
the PHP-script, which is driving the server insane.
Any ideas ?