tree e0dabf7a35438fe72eb650c259f90044289e7085
parent f87d559f23ba3fa40f79a8b78ca29937180d4ce2
author Valentin Bartenev <vbart@nginx.com> 1439299735 +0300
committer Valentin Bartenev <vbart@nginx.com> 1439299735 +0300

Core: idle connections now closed only once on exiting.

Iterating through all connections takes a lot of CPU time, especially
with large number of worker connections configured.  As a result
nginx processes used to consume CPU time during graceful shutdown.
To mitigate this we now only do a full scan for idle connections when
shutdown signal is received.

Transitions of connections to idle ones are now expected to be
avoided if the ngx_exiting flag is set.  The upstream keepalive module
was modified to follow this.