Hi dissoman Did you discover why this is happening? I've seen the same thing here. PHP5.3.5 FPM listneing on port 9000 with NGinx in front. The server runs very fast but erratically stops serving pages and I've seen similar events in my logs to yours: [11421122.928133] php5-fpm[16687]: segfault at 10 ip 6e77e2 sp 7fffffffa740 error 4 in php5-fpm[400000+833000] [11421142.518008] php5-fpm[16by ronanchilvers - Php-fpm Mailing List - English