Whenever nginx is sent a HUP signal, the cpu jumps to 100% then slowly drops until all the nginx worker processes that are trying to shutting down are done. Those nginx process usually take a while to shutdown since we're serving very large files (200MB-2GB). Any ideas why this is happening?

From the strace below it looks like it all in sendfile but I wouldn't think that would so cpu intense.

-gary

/usr/local/nginx/sbin/nginx -V nginx version: nginx/0.8.52 built by gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5) TLS SNI support enabled configure arguments: --with-http_ssl_module --with-http_flv_module

This is from about 10 seconds of strace of one of the nginx process while shutting down.

sudo strace -cp 7087 Process 7087 attached - interrupt to quit ^CProcess 7087 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 99.85 0.071681 139 515 sendfile 0.15 0.000110 0 252 epoll_wait ------ ----------- ----------- --------- --------- ---------------- 100.00 0.071791 767 total