I am checking /usr/local/apache/logs/error_log
This has happened several times. Sometimes server restart is fast sometimes it's slow. What factor could possibly contribute to this mess.
[Mon Dec 31 21:40:49 2012] [notice] Graceful restart requested, doing restart
[Mon Dec 31 21:40:53 2012] [error] [client 66.249.74.237] File does not exist: /home2/wallpape/public_html/tag
[Mon Dec 31 21:40:53 2012] [error] [client 66.249.74.237] File does not exist: /home2/wallpape/public_html/404.shtml
[Mon Dec 31 21:50:02 2012] [notice] SSL FIPS mode disabled
[Mon Dec 31 21:50:03 2012] [notice] Apache/2.2.23 (Unix) mod_ssl/2.2.23 OpenSSL/1.0.0-fips mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 configured -- resuming normal operations
On the other hand ungraceful restart seems to be faster:
[Mon Dec 31 21:52:58 2012] [notice] SIGHUP received. Attempting to restart
[Mon Dec 31 21:52:58 2012] [notice] SSL FIPS mode disabled
[Mon Dec 31 21:52:58 2012] [notice] Apache/2.2.23 (Unix) mod_ssl/2.2.23 OpenSSL/1.0.0-fips mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 configured -- resuming normal operations
From the manual: http://httpd.apache.org/docs/2.2/stopping.html
The parent re-reads its configuration files and re-opens its log files. As each child dies off the parent replaces it with a child from the new generation of the configuration, which begins serving new requests immediately.
It seems that graceful restart is designed so that service can run with no interruption at all. It doesn't work that way though. All domains in my server is death while restarting :(