Hi,
I'm running a very large site with Nginx 1.0.3 and PHP-FPM 5.3.6.
I noticed a weird behavior on the fpm side: sometimes a worker decides to use 100% CPU for few seconds, before it dies.
That makes the load go high and the site becomes unresponsive, even if Nginx cache and APC are used.
Changing worker mode to static done not do anything.
Do you know if there are any open bugs or patches related to this issue?