So i've checked and 0.7.61 seems to have similar behaviour (http://xgame.pl/nginx/) In logs the only suspicious thing was: 2009/06/25 23:38:09 19083#0: worker process 19088 exited on signal 11 and some others similar, always signal 11. So how to make coredump? I've got --with-debug package :) Posted at Nginx Forum: http://forum.nginx.org/read.php?2,3374,3396#msg-3396